Nevermind,
Found it :)
Find:
include/class.ticket.php
function create_by_staff($var,&$errors) {
global $_FILES,$thisuser,$cfg;
//check if the staff is allowed to create tickets.
if(!$thisuser || !$thisuser->getId() || !$thisuser->isStaff() || !$thisuser->canCreateTickets())
$errors='Permission denied';
if(!$var)
$errors='Summary of the issue required';
Immediately following that add:
if(!$var)
$errors='Staff required';
Don't forget to also update your field with the little red * to let them know its required.
include/staff/newticket.inc.php
* <?=$errors?>
That really just adds the bolded *. The rest is the same.
