Backported upstream patch to move the time zone fix in icaltimezone_get_utc_offset over
to icaltimezone_get_utc_offset_of_utc_time. r1141 made a fix in the first function but not
the second. This ensures these almost identical methods behave almost identically :) See
http://sourceforge.net/p/freeassociation/code/1150/ for the upstream patch and also Red Hat
Bugzilla at https://bugzilla.redhat.com/show_bug.cgi?id=1021136

--- libical-1.0/src/libical/icaltimezone.c		2013-04-14 19:24:42.000000000 +0200
+++ libical-1.0/src/libical/icaltimezone.c.r1150	2013-10-20 01:31:42.000000000 +0200
@@ -1045,9 +1045,12 @@
 	change_num += step;
 
 	/* If we go past the start of the changes array, then we have no data
-	   for this time so we return a UTC offset of 0. */
-	if (change_num < 0)
-	    return 0;
+	   for this time so we return the prev UTC offset. */
+	if (change_num < 0) {
+	    if (is_daylight)
+	    *is_daylight = ! tmp_change.is_daylight;
+	    return tmp_change.prev_utc_offset;
+	}
 
 	if ((unsigned int)change_num >= zone->changes->num_elements)
 	    break;