bugfix

booking.variety_admin.inc

@@ -861,6 +861,7 @@ function booking_variety_regn_edit_form_submit($form, &$form_state) {
     }
 
     //iterate over the old list comparing to the new list in case there are regn counts we need to decrease
+    if (isset($previous_variety_ids)) {
       foreach ($previous_variety_ids as $previous_tid => $previous_sid) {
         if (! isset($booking_variety_ids[$previous_tid])) {
           watchdog('booking_debug', 'Person @nid in timeslot @tid is no longer registered for a variety session so reducing count for @vid by 1', array(
@@ -873,6 +874,7 @@ function booking_variety_regn_edit_form_submit($form, &$form_state) {
             ->execute();          
         }
       }
+    }
 
     // update the session registration information for this person
 		$result = db_update('booking_variety_regn')