Fixed sprite allocation bugs

* Fixed bug that would cause the renderer for sprites to be corrupted on when the sprite vector is resized
* Changed deleted_sprites variable to deleted_animation in sprite object
* Changed sprite pointer vector to sprite id vector in canvas object
* Changed the value stored in Fixture UserData pointer to sprite id rather than sprite pointer because pointer would change on resize anyway

rcbasic_runtime/rc_sprite2D.h

@@ -51,7 +51,7 @@ struct rc_sprite2D_obj
 	int num_animation_loops;
 	int current_animation_loop;
 	bool isPlaying;
-	irr::core::array<int> deleted_sprites;
+	irr::core::array<int> deleted_animation;
 	irr::core::array<rc_sprite2D_animation_obj> animation;
 
 	int parent_canvas = -1;