### Eclipse Workspace Patch 1.0
#P moodle
Index: mod/quiz/lib.php
===================================================================
RCS file: /cvsroot/moodle/moodle/mod/quiz/lib.php,v
retrieving revision 1.273
diff -u -r1.273 lib.php
--- mod/quiz/lib.php	13 Aug 2007 11:19:51 -0000	1.273
+++ mod/quiz/lib.php	13 Aug 2007 13:31:25 -0000
@@ -437,12 +437,14 @@
                 $event2->id = $event2old->id;
                 update_event($event2);
             }
-        } else if (!empty($event2->id)) {
-            delete_event($event2->id);
+        } else if (!empty($event2old->id)) {
+            delete_event($event2old->id);
         }
 
         if (empty($event->id)) {
-            add_event($event);
+            if (!empty($event->timestart)) {
+                add_event($event);
+            }
         } else {
             update_event($event);
         }