Update filehandler.js

Author: scarlet9

lib/filehandler.js

@@ -1,14 +1,14 @@
 module.exports = function (middleware, options, callback) {
 
-    return function (req, res) {
+    return function (req, res, next) {
         res.set({
             'Access-Control-Allow-Origin': options.accessControl.allowOrigin,
             'Access-Control-Allow-Methods': options.accessControl.allowMethods
         });
         var UploadHandler = require('./uploadhandler')(options);
         var handler = new UploadHandler(req, res, function (result, redirect) {
             if (callback) {
-                callback(req, res, result);
+                callback(result, req, res, next);
             } else if (redirect) {
                 files = {files: result};
                 res.redirect(redirect.replace(/%s/, encodeURIComponent(JSON.stringify(files))));