Add alert in anim trees if resource load fails

Add_menu_type implements a resource loading, but only when
the resource is initially valid. No alert message is shown
if the resource isn't valid, leaving the user without feedback.

This commit adds an else clause to the is_valid command to give
feedback to the user when loading an animationPlaybackNode into
an animation tree fails.

0 files changed, 0 insertions, 0 deletions