Fix possible error on ajax request

Aleksander Machniak

2013-05-09 2a3e774c60b10e9593b5a3f9596fa68f1f389d86

Fix possible error on ajax request

 plugins/managesieve/managesieve.php

@@ -109,6 +109,11 @@
     */
    function mail_task_handler()
    {
        // make sure we're not in ajax request
        if ($this->rc->output->type != 'html') {
            return;
        }

        // use jQuery for popup window
        $this->require_plugin('jqueryui');