[evolution-ews] Convert 'Fifth' WeekDayIndex into 'Last' since it isnt supported by Microsoft

[Or Goshen <ogosh src gnome org>]

commit ed68899217a764e012195506aa9f314104e87d91
Author: Or Goshen <orx goshen intel com>
Date:   Mon Aug 22 10:25:22 2011 +0300

    Convert 'Fifth' WeekDayIndex into 'Last' since it isnt supported by Microsoft

 src/calendar/e-cal-backend-ews-utils.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/calendar/e-cal-backend-ews-utils.c b/src/calendar/e-cal-backend-ews-utils.c
index cbb371c..7d89dbd 100644
--- a/src/calendar/e-cal-backend-ews-utils.c
+++ b/src/calendar/e-cal-backend-ews-utils.c
@@ -475,7 +475,7 @@ void ewscal_set_reccurence (ESoapMessage *msg, icalproperty *rrule, icaltimetype
 				e_ews_message_write_string_parameter(msg, "DaysOfWeek", NULL,
 					number_to_weekday (icalrecurrencetype_day_day_of_week(recur.by_day[0])));
 				
-				e_ews_message_write_string_parameter(msg, "DayOfWeekIndex", NULL, weekindex_to_ical (recur.by_set_pos[0]));
+				e_ews_message_write_string_parameter(msg, "DayOfWeekIndex", NULL, weekindex_to_ical ((recur.by_set_pos[0] == 5 ? -1 : recur.by_set_pos[0])));
 
 				e_soap_message_end_element (msg); /* "RelativeMonthlyRecurrence" */