Removed a PHP notice

diff --git a/calendar/event.php b/calendar/event.php
index d735576c92914e6ac8ab5c752c6dc586800f339c..203f005a14afd391b283c61ee74236c87a9c190f 100644 (file)
--- a/calendar/event.php
+++ b/calendar/event.php
@@ -378,7 +378,7 @@
                     $form->timestart = make_timestamp($cal_y, $cal_m, 1, 0, 0, 0);
                 }
             }
-            if($form->timestart < 0) {
+            if(!isset($form->timestart) or $form->timestart < 0) {
                 $form->timestart = time();
             }