Fixed: FS#1067 - Webmail link does not work when there are no persmissions for sites module

Author: tbrehm

interface/web/mail/webmailer.php

@@ -32,7 +32,7 @@
 require_once('../../lib/app.inc.php');
 
 //* Check permissions for module
-$app->auth->check_module_permissions('sites');
+$app->auth->check_module_permissions('mail');
 
 /* get the id of the mail (must be int!) */
 if (!isset($_GET['id'])){