userData handling for Geometry in ObjectLoader

src/loaders/ObjectLoader.js

@@ -398,6 +398,7 @@ Object.assign( ObjectLoader.prototype, {
 				geometry.uuid = data.uuid;
 
 				if ( data.name !== undefined ) geometry.name = data.name;
+				if ( data.userData !== undefined ) geometry.userData = data.userData;
 
 				geometries[ data.uuid ] = geometry;