commit 2d7f700f3ef7de943549f4780252c9c6bcf1fc68
Author: Thomas Mittelstaedt <tmstaedt t-mittelstaedt de>
Date:   Thu Aug 15 07:27:34 2013 +0200

    Check for empty list in tray_list_remove_async

diff --git a/calendar/gui/alarm-notify/alarm-queue.c b/calendar/gui/alarm-notify/alarm-queue.c
index 9a3f80b..59a0884 100644
--- a/calendar/gui/alarm-notify/alarm-queue.c
+++ b/calendar/gui/alarm-notify/alarm-queue.c
@@ -1103,6 +1103,7 @@ static void
 tray_list_remove_async (Message *msg)
 {
 	GList *list = tray_icons_list;
+	g_return_if_fail (g_list_first(list) != NULL);
 
 	d(printf("%s:%d (tray_list_remove_async) - Removing %d alarms\n",__FILE__, __LINE__, g_list_length(list)));
 	while (list != NULL) {