Merge pull request #12314 from looeee/FBXLoader_switch_object3d_groups

FBXLoader switch default type from Object3D to Group

examples/js/loaders/FBXLoader.js

@@ -1773,7 +1773,7 @@
 						break;
 
 					default:
-						model = new THREE.Object3D();
+						model = new THREE.Group();
 						break;
 
 				}