Index: db_event_handler.php
===================================================================
--- db_event_handler.php	(revision 14020)
+++ db_event_handler.php	(working copy)
@@ -1001,7 +1001,7 @@
 				}
 			}
 
-			$list_sortings = $this->Application->getUnitOption($event->Prefix, 'ListSortings');
+			$list_sortings = $this->Application->getUnitOption($event->Prefix, 'ListSortings', Array ());
 			$sorting_prefix = array_key_exists($event->Special, $list_sortings) ? $event->Special : '';
 			$sorting_configs = $this->Application->getUnitOption($event->Prefix, 'ConfigMapping');