Fix warnings about wrong member initialization order [-Wreorder]

Fixes the following GCC 5 warnings:
```
core/object.h:193:11: warning: 'MethodInfo::flags' will be initialized after [-Wreorder]
core/object.h:192:15: warning:   'PropertyInfo MethodInfo::return_val' [-Wreorder]
core/object.cpp:278:1: warning:   when initialized here [-Wreorder]
core/script_debugger_remote.h:97:6: warning: 'ScriptDebuggerRemote::max_cps' will be initialized after [-Wreorder]
core/script_debugger_remote.h:91:6: warning:   'int ScriptDebuggerRemote::max_messages_per_frame' [-Wreorder]
core/script_debugger_remote.cpp:1086:1: warning:   when initialized here [-Wreorder]
core/script_debugger_remote.h:98:6: warning: 'ScriptDebuggerRemote::char_count' will be initialized after [-Wreorder]
core/script_debugger_remote.h:92:6: warning:   'int ScriptDebuggerRemote::n_messages_dropped' [-Wreorder]
core/script_debugger_remote.cpp:1086:1: warning:   when initialized here [-Wreorder]
modules/bullet/area_bullet.h:102:7: warning: 'AreaBullet::isScratched' will be initialized after [-Wreorder]
modules/bullet/area_bullet.h:92:39: warning:   'PhysicsServer::AreaSpaceOverrideMode AreaBullet::spOv_mode' [-Wreorder]
modules/bullet/area_bullet.cpp:46:1: warning:   when initialized here [-Wreorder]
modules/bullet/collision_object_bullet.h:127:15: warning: 'CollisionObjectBullet::space' will be initialized after [-Wreorder]
modules/bullet/collision_object_bullet.h:117:7: warning:   'CollisionObjectBullet::Type CollisionObjectBullet::type' [-Wreorder]
modules/bullet/collision_object_bullet.cpp:67:1: warning:   when initialized here [-Wreorder]
modules/bullet/godot_ray_world_algorithm.h:48:7: warning: 'GodotRayWorldAlgorithm::m_ownManifol1d' will be initialized after [-Wreorder]
modules/bullet/godot_ray_world_algorithm.h:46:33: warning:   'const btDiscreteDynamicsWorld* GodotRayWorldAlgorithm::m_world' [-Wreorder]
modules/bullet/godot_ray_world_algorithm.cpp:50:1: warning:   when initialized here [-Wreorder]
modules/bullet/godot_result_callbacks.h:91:18: warning: 'GodotAllConvexResultCallback::m_exclude' will be initialized after [-Wreorder]
modules/bullet/godot_result_callbacks.h:89:6: warning:   'int GodotAllConvexResultCallback::m_resultMax' [-Wreorder]
modules/bullet/godot_result_callbacks.h:93:2: warning:   when initialized here [-Wreorder]
modules/bullet/godot_result_callbacks.h:142:18: warning: 'GodotAllContactResultCallback::m_exclude' will be initialized after [-Wreorder]
modules/bullet/godot_result_callbacks.h:140:6: warning:   'int GodotAllContactResultCallback::m_resultMax' [-Wreorder]
modules/bullet/godot_result_callbacks.h:147:2: warning:   when initialized here [-Wreorder]
modules/bullet/godot_result_callbacks.h:168:18: warning: 'GodotContactPairContactResultCallback::m_exclude' will be initialized after [-Wreorder]
modules/bullet/godot_result_callbacks.h:166:6: warning:   'int GodotContactPairContactResultCallback::m_resultMax' [-Wreorder]
modules/bullet/godot_result_callbacks.h:173:2: warning:   when initialized here [-Wreorder]
modules/bullet/godot_result_callbacks.h:195:18: warning: 'GodotRestInfoContactResultCallback::m_exclude' will be initialized after [-Wreorder]
modules/bullet/godot_result_callbacks.h:191:7: warning:   'bool GodotRestInfoContactResultCallback::m_collided' [-Wreorder]
modules/bullet/godot_result_callbacks.h:199:2: warning:   when initialized here [-Wreorder]
modules/bullet/rigid_body_bullet.h:200:9: warning: 'RigidBodyBullet::gravity_scale' will be initialized after [-Wreorder]
modules/bullet/rigid_body_bullet.h:199:9: warning:   'real_t RigidBodyBullet::mass' [-Wreorder]
modules/bullet/rigid_body_bullet.cpp:258:1: warning:   when initialized here [-Wreorder]
modules/bullet/rigid_body_bullet.h:222:28: warning: 'RigidBodyBullet::force_integration_callback' will be initialized after [-Wreorder]
modules/bullet/rigid_body_bullet.h:219:7: warning:   'bool RigidBodyBullet::isTransformChanged' [-Wreorder]
modules/bullet/rigid_body_bullet.cpp:258:1: warning:   when initialized here [-Wreorder]
modules/bullet/rigid_body_bullet.h:220:7: warning: 'RigidBodyBullet::previousActiveState' will be initialized after [-Wreorder]
modules/bullet/rigid_body_bullet.h:208:6: warning:   'int RigidBodyBullet::maxCollisionsDetection' [-Wreorder]
modules/bullet/rigid_body_bullet.cpp:258:1: warning:   when initialized here [-Wreorder]
modules/bullet/soft_body_bullet.h:69:9: warning: 'SoftBodyBullet::total_mass' will be initialized after [-Wreorder]
modules/bullet/soft_body_bullet.h:68:6: warning:   'int SoftBodyBullet::simulation_precision' [-Wreorder]
modules/bullet/soft_body_bullet.cpp:38:1: warning:   when initialized here [-Wreorder]
modules/bullet/soft_body_bullet.h:76:9: warning: 'SoftBodyBullet::drag_coefficient' will be initialized after [-Wreorder]
modules/bullet/soft_body_bullet.h:61:14: warning:   'btSoftBody* SoftBodyBullet::bt_soft_body' [-Wreorder]
modules/bullet/soft_body_bullet.cpp:38:1: warning:   when initialized here [-Wreorder]
modules/bullet/space_bullet.h:97:22: warning: 'SpaceBullet::solver' will be initialized after [-Wreorder]
modules/bullet/space_bullet.h:95:35: warning:   'btDefaultCollisionConfiguration* SpaceBullet::collisionConfiguration' [-Wreorder]
modules/bullet/space_bullet.cpp:333:1: warning:   when initialized here [-Wreorder]
modules/bullet/space_bullet.h:101:23: warning: 'SpaceBullet::soft_body_world_info' will be initialized after [-Wreorder]
modules/bullet/space_bullet.h:99:23: warning:   'btGhostPairCallback* SpaceBullet::ghostPairCallback' [-Wreorder]
modules/bullet/space_bullet.cpp:333:1: warning:   when initialized here [-Wreorder]
modules/gdnative/nativescript/nativescript.h:79:13: warning: 'NativeScriptDesc::base_native_type' will be initialized after [-Wreorder]
modules/gdnative/nativescript/nativescript.h:73:9: warning:   'String NativeScriptDesc::documentation' [-Wreorder]
modules/gdnative/nativescript/nativescript.h:88:9: warning:   when initialized here [-Wreorder]
modules/gdscript/gdscript.h:296:6: warning: 'GDScriptWarning::line' will be initialized after [-Wreorder]
modules/gdscript/gdscript.h:294:4: warning:   'GDScriptWarning::Code GDScriptWarning::code' [-Wreorder]
modules/gdscript/gdscript.h:303:2: warning:   when initialized here [-Wreorder]
scene/3d/physics_body.h:544:7: warning: 'PhysicalBone::simulate_physics' will be initialized after [-Wreorder]
scene/3d/physics_body.h:543:7: warning:   'bool PhysicalBone::_internal_static_body' [-Wreorder]
scene/3d/physics_body.cpp:2502:1: warning:   when initialized here [-Wreorder]
scene/3d/physics_body.h:546:6: warning: 'PhysicalBone::bone_id' will be initialized after [-Wreorder]
scene/3d/physics_body.h:539:12: warning:   'Skeleton* PhysicalBone::parent_skeleton' [-Wreorder]
scene/3d/physics_body.cpp:2502:1: warning:   when initialized here [-Wreorder]
scene/3d/spring_arm.h:44:11: warning: 'SpringArm::mask' will be initialized after [-Wreorder]
scene/3d/spring_arm.h:43:8: warning:   'float SpringArm::current_spring_length' [-Wreorder]
scene/3d/spring_arm.cpp:37:1: warning:   when initialized here [-Wreorder]
scene/animation/skeleton_ik.h:159:11: warning: 'SkeletonIK::target_node_override' will be initialized after [-Wreorder]
scene/animation/skeleton_ik.h:152:7: warning:   'bool SkeletonIK::use_magnet' [-Wreorder]
scene/animation/skeleton_ik.cpp:418:1: warning:   when initialized here [-Wreorder]
scene/resources/tile_set.h:84:9: warning: 'TileSet::AutotileData::size' will be initialized after [-Wreorder]
scene/resources/tile_set.h:83:7: warning:   'int TileSet::AutotileData::spacing' [-Wreorder]
scene/resources/tile_set.h:92:12: warning:   when initialized here [-Wreorder]
scene/resources/tile_set.h:115:12: warning: 'TileSet::TileData::tile_mode' will be initialized after [-Wreorder]
scene/resources/tile_set.h:114:9: warning:   'Color TileSet::TileData::modulate' [-Wreorder]
scene/resources/tile_set.h:120:12: warning:   when initialized here [-Wreorder]
servers/physics/body_sw.h:84:19: warning: 'BodySW::direct_state_query_list' will be initialized after [-Wreorder]
servers/physics/body_sw.h:57:11: warning:   'uint16_t BodySW::locked_axis' [-Wreorder]
servers/physics/body_sw.cpp:756:1: warning:   when initialized here [-Wreorder]
```

Nothing really relevant for us, but it's not a bad consistency
improvement anyway so worth taking.

5 files changed, 11 insertions, 11 deletions

diff --git a/scene/3d/physics_body.cpp b/scene/3d/physics_body.cpp
index 95a83bfc1f..0fb0869979 100644
--- a/scene/3d/physics_body.cpp
+++ b/scene/3d/physics_body.cpp
@@ -2509,12 +2509,12 @@ PhysicalBone::PhysicalBone() :
 		gizmo_move_joint(false),
 #endif
 		joint_data(NULL),
+		parent_skeleton(NULL),
 		static_body(false),
-		simulate_physics(false),
 		_internal_static_body(false),
+		simulate_physics(false),
 		_internal_simulate_physics(false),
 		bone_id(-1),
-		parent_skeleton(NULL),
 		bone_name(""),
 		bounce(0),
 		mass(1),
diff --git a/scene/3d/spring_arm.cpp b/scene/3d/spring_arm.cpp
index 818e7f9217..f74784c2f9 100644
--- a/scene/3d/spring_arm.cpp
+++ b/scene/3d/spring_arm.cpp
@@ -36,8 +36,9 @@
 
 SpringArm::SpringArm() :
 		spring_length(1),
-		mask(1),
 		current_spring_length(0),
+		keep_child_basis(false),
+		mask(1),
 		margin(0.01) {}
 
 void SpringArm::_notification(int p_what) {
diff --git a/scene/3d/spring_arm.h b/scene/3d/spring_arm.h
index 24d912d371..e0c3f2992d 100644
--- a/scene/3d/spring_arm.h
+++ b/scene/3d/spring_arm.h
@@ -39,8 +39,8 @@ class SpringArm : public Spatial {
 	Ref<Shape> shape;
 	Set<RID> excluded_objects;
 	float spring_length;
-	bool keep_child_basis;
 	float current_spring_length;
+	bool keep_child_basis;
 	uint32_t mask;
 	float margin;
 
diff --git a/scene/animation/skeleton_ik.cpp b/scene/animation/skeleton_ik.cpp
index 69975e6195..83f45afac8 100644
--- a/scene/animation/skeleton_ik.cpp
+++ b/scene/animation/skeleton_ik.cpp
@@ -418,11 +418,11 @@ void SkeletonIK::_notification(int p_what) {
 SkeletonIK::SkeletonIK() :
 		Node(),
 		interpolation(1),
-		skeleton(NULL),
-		target_node_override(NULL),
 		use_magnet(false),
 		min_distance(0.01),
 		max_iterations(10),
+		skeleton(NULL),
+		target_node_override(NULL),
 		task(NULL) {
 
 	set_process_priority(1);
diff --git a/scene/resources/tile_set.h b/scene/resources/tile_set.h
index 74dcd47c48..1802bf12b6 100644
--- a/scene/resources/tile_set.h
+++ b/scene/resources/tile_set.h
@@ -80,8 +80,8 @@ public:
 
 	struct AutotileData {
 		BitmaskMode bitmask_mode;
-		int spacing;
 		Size2 size;
+		int spacing;
 		Vector2 icon_coord;
 		Map<Vector2, uint16_t> flags;
 		Map<Vector2, Ref<OccluderPolygon2D> > occluder_map;
@@ -90,11 +90,10 @@ public:
 
 		// Default size to prevent invalid value
 		explicit AutotileData() :
+				bitmask_mode(BITMASK_2X2),
 				size(64, 64),
 				spacing(0),
-				icon_coord(0, 0) {
-			bitmask_mode = BITMASK_2X2;
-		}
+				icon_coord(0, 0) {}
 	};
 
 private:
@@ -111,8 +110,8 @@ private:
 		Vector2 navigation_polygon_offset;
 		Ref<NavigationPolygon> navigation_polygon;
 		Ref<ShaderMaterial> material;
-		Color modulate;
 		TileMode tile_mode;
+		Color modulate;
 		AutotileData autotile_data;
 		int z_index;