Merge pull request #228 from canon4ever/patch-1

自定义文件名，会导致无扩展名

examples/php/editormd.uploader.class.php

@@ -252,7 +252,7 @@
         
          private function setSeveName()
          {             
-            $this->saveName = $this->randomFileName();
+            $this->saveName = $this->randomFileName().".".$this->fileExt;
              
             if($this->saveName == '') //如果没生成随机文件名，就保留原文件名
             {