complete function returns empty buffer

complete function returns empty buffer since uploaded to the temporary file.

lib/tempFileHandler.js

@@ -38,6 +38,7 @@ module.exports = function(options, fieldname, filename) {
     },
     complete: function(){
       writeStream.end();
+      return Buffer.concat([]); //return empty buffer since uploaded to the temporary file.
     }
   };
 };