avoid exception when delete file without thumbnail

Author: fangj

lib/uploadhandler.js

@@ -6,7 +6,8 @@ var EventEmitter = require('events').EventEmitter,
     mkdirp = require('mkdirp'),
     _ = require('lodash'),
     async = require('async');
-var doNothing=function(){}
+var doNothing=function(){};
+
 module.exports = function (options) {
 
     var FileInfo = require('./fileinfo')(
@@ -189,7 +190,7 @@ module.exports = function (options) {
         }
         fs.unlink(filepath, function (ex) {
             _.each(options.imageVersions, function (value, version) {
-                fs.unlink(path.join(options.uploadDir(), version, fileName),doNothing);
+                fs.unlink(path.join(options.uploadDir(), version, fileName), doNothing);
             });
             self.emit('delete', fileName);
             self.callback({success: !ex});