From 99ca6a592bf84e71e625175b43312a18d31af8b5 Mon Sep 17 00:00:00 2001
From: Ralf Becker <ralfbecker@outdoor-training.de>
Date: Mon, 10 Feb 2014 08:53:40 +0000
Subject: [PATCH] * CalDAV/Calendar: fixed invalid ics file for alarm exactly
 at the event

---
 phpgwapi/inc/horde/Horde/iCalendar.php | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/phpgwapi/inc/horde/Horde/iCalendar.php b/phpgwapi/inc/horde/Horde/iCalendar.php
index caa1c05add..efd13629eb 100644
--- a/phpgwapi/inc/horde/Horde/iCalendar.php
+++ b/phpgwapi/inc/horde/Horde/iCalendar.php
@@ -1622,6 +1622,11 @@ class Horde_iCalendar {
                 $duration .= $value . 'S';
             }
         }
+		// duration without time ("P") is NOT valid, append 0 minutes ("T0M")
+		elseif ($duration === 'P')
+		{
+			$duration .= 'T0M';
+		}
 
         return $duration;
     }