From f08169e5232639ee225de3980eaf8d5ea5f6ebc8 Mon Sep 17 00:00:00 2001
From: Thomas Bruederli <bruederli@kolabsys.com>
Date: Wed, 11 Sep 2013 10:00:48 +0200
Subject: [PATCH] Avoid warnings when event['recurrence'] is a string

---
 plugins/calendar/calendar.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/plugins/calendar/calendar.php b/plugins/calendar/calendar.php
index 3b8728a3..4dec7089 100644
--- a/plugins/calendar/calendar.php
+++ b/plugins/calendar/calendar.php
@@ -1369,7 +1369,7 @@ class calendar extends rcube_plugin
       return;
     }
 
-    if ($event['recurrence']['UNTIL'])
+    if (is_array($event['recurrence']) && !empty($event['recurrence']['UNTIL']))
       $event['recurrence']['UNTIL'] = new DateTime($event['recurrence']['UNTIL'], $this->timezone);
 
     $attachments = array();