ObjectLoader: call onError if no metadata found in json (#24891)

* ObjectLoader: call onError if no metadata found in json

* add spaces

src/loaders/ObjectLoader.js

@@ -101,6 +101,8 @@ class ObjectLoader extends Loader {
 
 			if ( metadata === undefined || metadata.type === undefined || metadata.type.toLowerCase() === 'geometry' ) {
 
+				if ( onError !== undefined ) onError( new Error( 'THREE.ObjectLoader: Can\'t load ' + url ) );
+
 				console.error( 'THREE.ObjectLoader: Can\'t load ' + url );
 				return;