[evolution-exchange] Bug #604255 - e-calendar-factory crashed on start up

[Milan Crha <mcrha src gnome org>]

commit ed5a1bfc7bcd808dcdb42c4d061defd8c3649c54
Author: Milan Crha <mcrha redhat com>
Date:   Thu Dec 10 16:52:32 2009 +0100

    Bug #604255 - e-calendar-factory crashed on start up
    
    Regression after fix for bug #602945.

 calendar/e-cal-backend-exchange.c |   10 ++++++++--
 1 files changed, 8 insertions(+), 2 deletions(-)
---
diff --git a/calendar/e-cal-backend-exchange.c b/calendar/e-cal-backend-exchange.c
index 57b8cc5..f86783a 100644
--- a/calendar/e-cal-backend-exchange.c
+++ b/calendar/e-cal-backend-exchange.c
@@ -2154,8 +2154,14 @@ e_cal_backend_exchange_lookup_timezone (const gchar *tzid,
 					gconstpointer custom,
 					GError **error)
 {
-	return internal_get_timezone (E_CAL_BACKEND ((ECalBackendExchange *)custom),
-				      tzid);
+	icaltimezone *zone = internal_get_timezone (E_CAL_BACKEND ((ECalBackendExchange *)custom), tzid);
+
+	/* The UTC timezone is a fallback, which is not supposed
+	   to be returned in call of e_cal_check_timezones, thus skip it */
+	if (zone && zone == icaltimezone_get_utc_timezone ())
+		zone = NULL;
+
+	return zone;
 }
 
 static void