* finish task #4587.

module/task/model.php

@@ -822,6 +822,11 @@ class taskModel extends model
             ->setDefault('assignedDate', $now)
             ->remove('comment,showModule')
             ->get();
+        if($oldTask->status != 'done' and $oldTask->status != 'closed' and $task->left == 0)
+        {
+            dao::$errors[] = sprintf($this->lang->error->notempty, $this->lang->task->left);
+            return false;
+        }
 
         if(!empty($oldTask->team))
         {

module/task/view/assignto.html.php

@@ -39,10 +39,12 @@
           <th class='w-80px'><?php echo empty($task->team) ? $lang->task->assign : $lang->task->transferTo;?></th>
           <td class='w-p25-f'><?php echo html::select('assignedTo', $members, empty($task->team) ? $task->assignedTo : $task->nextUser, "class='form-control chosen'");?></td><td></td>
         </tr>  
+        <?php if($task->status != 'done' and $task->status != 'closed'):?>
         <tr>
           <th><?php echo $lang->task->left;?></th>
           <td><div class='input-group'><?php echo html::input('left', $task->left, "class='form-control' autocomplete='off'");?> <span class='input-group-addon'><?php echo $lang->task->hour;?></span></div></td><td></td>
         </tr>  
+        <?php endif;?>
         <tr>
           <th><?php echo $lang->comment;?></th>
           <td colspan='2'><?php echo html::textarea('comment', '', "rows='6' class='form-control w-p98'");?></td>