initialize refocus_over_tile to false

Co-authored-by: Tomek <[email protected]>

editor/plugins/tile_map_editor_plugin.h

@@ -119,7 +119,7 @@ class TileMapEditor : public VBoxContainer {
 	Rect2i rectangle;
 
 	Point2i over_tile;
-	bool refocus_over_tile;
+	bool refocus_over_tile = false;
 
 	bool *bucket_cache_visited;
 	Rect2i bucket_cache_rect;