Fix use of unitialized variables

The second in my quest to make Godot 3.x compile with -Werror on GCC7

5 files changed, 22 insertions, 16 deletions

diff --git a/editor/editor_audio_buses.cpp b/editor/editor_audio_buses.cpp
index b3eb3e23a9..6937f74316 100644
--- a/editor/editor_audio_buses.cpp
+++ b/editor/editor_audio_buses.cpp
@@ -70,11 +70,14 @@ void EditorAudioBus::_notification(int p_what) {
 		float real_peak[2] = { -100, -100 };
 		bool activity_found = false;
 
-		int cc;
+		int cc = 0;
 		switch (AudioServer::get_singleton()->get_speaker_mode()) {
 			case AudioServer::SPEAKER_MODE_STEREO: cc = 1; break;
 			case AudioServer::SPEAKER_SURROUND_51: cc = 4; break;
 			case AudioServer::SPEAKER_SURROUND_71: cc = 5; break;
+			default:
+				ERR_PRINT("Unknown speaker_mode");
+				break;
 		}
 
 		for (int i = 0; i < cc; i++) {
diff --git a/editor/import/resource_importer_wav.cpp b/editor/import/resource_importer_wav.cpp
index 25185149b1..e2bacd70e4 100644
--- a/editor/import/resource_importer_wav.cpp
+++ b/editor/import/resource_importer_wav.cpp
@@ -129,7 +129,7 @@ Error ResourceImporterWAV::import(const String &p_source_file, const String &p_s
 	int format_freq = 0;
 	int loop_begin = 0;
 	int loop_end = 0;
-	int frames;
+	int frames = 0;
 
 	Vector<float> data;
 
diff --git a/editor/plugins/canvas_item_editor_plugin.cpp b/editor/plugins/canvas_item_editor_plugin.cpp
index 601842799a..3b74601e78 100644
--- a/editor/plugins/canvas_item_editor_plugin.cpp
+++ b/editor/plugins/canvas_item_editor_plugin.cpp
@@ -1881,7 +1881,7 @@ void CanvasItemEditor::_viewport_draw() {
 	if (snap_show_grid) {
 		//Draw the grid
 		Size2 s = viewport->get_size();
-		int last_cell;
+		int last_cell = 0;
 		Transform2D xform = transform.affine_inverse();
 
 		Vector2 grid_offset;
@@ -2257,17 +2257,17 @@ void CanvasItemEditor::_notification(int p_what) {
 				anchors[MARGIN_RIGHT] = Object::cast_to<Control>(canvas_item)->get_anchor(MARGIN_RIGHT);
 				anchors[MARGIN_TOP] = Object::cast_to<Control>(canvas_item)->get_anchor(MARGIN_TOP);
 				anchors[MARGIN_BOTTOM] = Object::cast_to<Control>(canvas_item)->get_anchor(MARGIN_BOTTOM);
-			}
 
-			if (r != se->prev_rect || xform != se->prev_xform || pivot != se->prev_pivot || anchors[MARGIN_LEFT] != se->prev_anchors[MARGIN_LEFT] || anchors[MARGIN_RIGHT] != se->prev_anchors[MARGIN_RIGHT] || anchors[MARGIN_TOP] != se->prev_anchors[MARGIN_TOP] || anchors[MARGIN_BOTTOM] != se->prev_anchors[MARGIN_BOTTOM]) {
-				viewport->update();
-				se->prev_rect = r;
-				se->prev_xform = xform;
-				se->prev_pivot = pivot;
-				se->prev_anchors[MARGIN_LEFT] = anchors[MARGIN_LEFT];
-				se->prev_anchors[MARGIN_RIGHT] = anchors[MARGIN_RIGHT];
-				se->prev_anchors[MARGIN_TOP] = anchors[MARGIN_TOP];
-				se->prev_anchors[MARGIN_BOTTOM] = anchors[MARGIN_BOTTOM];
+				if (r != se->prev_rect || xform != se->prev_xform || pivot != se->prev_pivot || anchors[MARGIN_LEFT] != se->prev_anchors[MARGIN_LEFT] || anchors[MARGIN_RIGHT] != se->prev_anchors[MARGIN_RIGHT] || anchors[MARGIN_TOP] != se->prev_anchors[MARGIN_TOP] || anchors[MARGIN_BOTTOM] != se->prev_anchors[MARGIN_BOTTOM]) {
+					viewport->update();
+					se->prev_rect = r;
+					se->prev_xform = xform;
+					se->prev_pivot = pivot;
+					se->prev_anchors[MARGIN_LEFT] = anchors[MARGIN_LEFT];
+					se->prev_anchors[MARGIN_RIGHT] = anchors[MARGIN_RIGHT];
+					se->prev_anchors[MARGIN_TOP] = anchors[MARGIN_TOP];
+					se->prev_anchors[MARGIN_BOTTOM] = anchors[MARGIN_BOTTOM];
+				}
 			}
 		}
 
diff --git a/editor/plugins/polygon_2d_editor_plugin.cpp b/editor/plugins/polygon_2d_editor_plugin.cpp
index a3195c05d6..f7008298f0 100644
--- a/editor/plugins/polygon_2d_editor_plugin.cpp
+++ b/editor/plugins/polygon_2d_editor_plugin.cpp
@@ -659,7 +659,7 @@ void Polygon2DEditor::_uv_draw() {
 
 	if (snap_show_grid) {
 		Size2 s = uv_edit_draw->get_size();
-		int last_cell;
+		int last_cell = 0;
 
 		if (snap_step.x != 0) {
 			for (int i = 0; i < s.width; i++) {
diff --git a/editor/plugins/texture_region_editor_plugin.cpp b/editor/plugins/texture_region_editor_plugin.cpp
index 82b507bd49..38d1350b07 100644
--- a/editor/plugins/texture_region_editor_plugin.cpp
+++ b/editor/plugins/texture_region_editor_plugin.cpp
@@ -67,7 +67,7 @@ void TextureRegionEditor::_region_draw() {
 
 	if (snap_mode == SNAP_GRID) {
 		Size2 s = edit_draw->get_size();
-		int last_cell;
+		int last_cell = 0;
 
 		if (snap_step.x != 0) {
 			if (snap_separation.x == 0)
@@ -406,7 +406,7 @@ void TextureRegionEditor::_region_input(const Ref<InputEvent> &p_input) {
 		} else if (drag) {
 
 			if (edited_margin >= 0) {
-				float new_margin;
+				float new_margin = 0;
 				if (edited_margin == 0)
 					new_margin = prev_margin + (mm->get_position().y - drag_from.y) / draw_zoom;
 				else if (edited_margin == 1)
@@ -415,6 +415,9 @@ void TextureRegionEditor::_region_input(const Ref<InputEvent> &p_input) {
 					new_margin = prev_margin + (mm->get_position().x - drag_from.x) / draw_zoom;
 				else if (edited_margin == 3)
 					new_margin = prev_margin - (mm->get_position().x - drag_from.x) / draw_zoom;
+				else
+					ERR_PRINT("Unexpected edited_margin");
+
 				if (new_margin < 0)
 					new_margin = 0;
 				static Margin m[4] = { MARGIN_TOP, MARGIN_BOTTOM, MARGIN_LEFT, MARGIN_RIGHT };