Fixed a warning in cron log on non web servers.

tbrehm

2012-07-19 dae3b41faee2777046b0b612e2bd8b28caf0f189

 interface/web/sites/webdav_user_list.php

@@ -44,7 +44,7 @@
$app->auth->check_module_permissions('sites');

$app->uses('listform_actions');

$app->listform_actions->SQLOrderBy = 'ORDER BY username';
$app->listform_actions->onLoad();