dept: Fix ::getMembersForAlerts() for primary depts

include/class.staff.php

@@ -1082,6 +1082,10 @@ class StaffDeptAccess extends VerySimpleModel {
         'joins' => array(
             'dept' => array(
                 'constraint' => array('dept_id' => 'Dept.id'),
+                // FIXME: The ORM needs a way to support
+                //        staff__dept_access__dept performing a LEFT join b/c
+                //        staff__dept_access is LEFT
+                'null' => true,
             ),
             'staff' => array(
                 'constraint' => array('staff_id' => 'Staff.staff_id'),