From d1247d6c5f8777f90d93912ee241fd0e05d07800 Mon Sep 17 00:00:00 2001
From: Ralf Becker <ralfbecker@outdoor-training.de>
Date: Thu, 19 Apr 2012 12:52:00 +0000
Subject: [PATCH] * CalDAV: fixed PHP Fatal Error when iCal contains invalid
 participant url like Lighttnings "invalid:noemail"

---
 phpgwapi/inc/class.groupdav_principals.inc.php | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/phpgwapi/inc/class.groupdav_principals.inc.php b/phpgwapi/inc/class.groupdav_principals.inc.php
index 80ad43654d..fb0ee12884 100644
--- a/phpgwapi/inc/class.groupdav_principals.inc.php
+++ b/phpgwapi/inc/class.groupdav_principals.inc.php
@@ -891,7 +891,10 @@ class groupdav_principals extends groupdav_handler
 				break;
 
 			default:
-				$this->groupdav->log(__METHOD__."('$url') unsupported principal URL '$url'!");
+				if (isset($GLOBALS['groupdav']) && is_a($GLOBALS['groupdav'],'groupdav'))
+				{
+					$GLOBALS['groupdav']->log(__METHOD__."('$url') unsupported principal URL '$url'!");
+				}
 				return false;
 		}
 		return $uid && in_array($type, $only_type) ? $uid : false;