return XMLHttpRequest returned from XHRLoader

examples/js/loaders/STLLoader.js

@@ -44,12 +44,13 @@ THREE.STLLoader.prototype = {
 		var loader = new THREE.XHRLoader( scope.manager );
 		loader.setCrossOrigin( this.crossOrigin );
 		loader.setResponseType('arraybuffer');
-		loader.load( url, function ( text ) {
+		var request = loader.load( url, function ( text ) {
 
 			onLoad( scope.parse( text ) );
 
 		}, onProgress, onError );
 
+		return request;
 	},
 
 	parse: function ( data ) {