Merge pull request #1366 from williamchange/fix-crash-3d-map-export

Fix crash using 3d map export menu from custom mesh

Author: RodZill4

material_maker/panels/preview_3d/export_menu.gd

@@ -96,7 +96,7 @@ func interpret_map_file_name(file_name: String, path:="") -> String:
 
 	var graph_node : MMGenBase = get_node("/root/MainWindow").get_current_graph_edit().generator
 
-	return mm_globals.interpret_file_name(file_name, path, extension, graph_node, additional_ids, resolution)
+	return MMLoader.interpret_file_name(file_name, path, extension, graph_node, additional_ids, resolution)
 
 func _on_map_file_type_item_selected(_index: int) -> void:
 	update_generate_map_file_label()