From f5cc6d26187a8fe3d1b4c1085bdc26fdb44d1b64 Mon Sep 17 00:00:00 2001
From: Thomas Bruederli <bruederli@kolabsys.com>
Date: Wed, 6 Mar 2013 12:56:15 +0100
Subject: [PATCH] Avoid javascript errors while free/busy data isn't fully
 loaded

---
 plugins/calendar/calendar_ui.js | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/plugins/calendar/calendar_ui.js b/plugins/calendar/calendar_ui.js
index fd003da7..6a333e8b 100644
--- a/plugins/calendar/calendar_ui.js
+++ b/plugins/calendar/calendar_ui.js
@@ -1252,6 +1252,10 @@ function rcube_calendar_ui(settings)
     // attempt to find a time slot where all attemdees are available
     var freebusy_find_slot = function(dir)
     {
+      // exit if free-busy data isn't available yet
+      if (!freebusy_data || !freebusy_data.start)
+        return false;
+
       var event = me.selected_event,
         eventstart = clone_date(event.start, event.allDay ? 1 : 0).getTime(),  // calculate with integers
         eventend = clone_date(event.end, event.allDay ? 2 : 0).getTime(),