correct return type

docs/api/en/loaders/FileLoader.html

@@ -91,7 +91,7 @@
 
 		<h2>Methods</h2>
 
-		<h3>[method:null load]( [param:String url], [param:Function onLoad], [param:Function onProgress], [param:Function onError] )</h3>
+		<h3>[method:XMLHttpRequest load]( [param:String url], [param:Function onLoad], [param:Function onProgress], [param:Function onError] )</h3>
 		<p>
 			[page:String url] — the path or URL to the file. This can also be a
 				[link:https://developer.mozilla.org/en-US/docs/Web/HTTP/Basics_of_HTTP/Data_URIs Data URI].<br />