Fix bucket fill behaviour when selecting multiple tiles

editor/plugins/tile_map_editor_plugin.cpp

@@ -533,10 +533,9 @@ PoolVector<Vector2> TileMapEditor::_bucket_fill(const Point2i &p_start, bool era
 		return PoolVector<Vector2>();
 	}
 
-	for (int i = ids.size() - 1; i >= 0; i--) {
-		if (ids[i] == prev_id) {
-			return PoolVector<Vector2>();
-		}
+	if (ids.size() == 1 && ids[0] == prev_id) {
+		// Same ID, nothing to change
+		return PoolVector<Vector2>();
 	}
 
 	Rect2i r = node->get_used_rect();