MailQ cron broken if triggered via PHP parser

I have a somewhat unusual setup. My hosting provider disallows the localhost loopback so the only way I can set up cron to run is via a script which invokes the php parser directly to run cron.php

Since MailQ relies on $_GET['q'] or the request_uri() to determine if it should or should not declare its drupal_mail_wrapper() function, when my system runs cron, MailQ's wrapper gets in the way. The result is that emails are never sent but are continually re-queued with a blank mailkey.

My fix is the attached patch for others in the same situation I'm in, but I'm also wondering you can think of a better fix. Otherwise, thanks for the great module!