* fix the error when edit a user.

module/user/model.php

@@ -111,7 +111,7 @@ class userModel extends model
         /* 进行其他的检查，更新数据库。*/
         $userID = (int)$userID;
         $user = fixer::input('post')
-            ->setDefault('join', '0000-00-00')
+            ->setIF(isset($_POST['join']) and $this->post->join == '', 'join', '0000-00-00')
             ->setIF($this->post->password1 != false, 'password', md5($this->post->password1))
             ->remove('password1, password2')
             ->get();

module/user/view/edit.html.php

@@ -46,7 +46,7 @@
       </tr>  
       <tr>
         <th class='rowhead'><?php echo $lang->user->join;?></th>
-        <td><?php echo html::input('join', '', "class='text-3 date'");?></td>
+        <td><?php echo html::input('join', $user->join, "class='text-3 date'");?></td>
       </tr>  
       <tr>
         <th class='rowhead'><?php echo $lang->user->gendar;?></th>