[evolution-ews] Mute false-positive compiler warning about used uninitialized variable

[Milan Crha <mcrha src gnome org>]

commit d3f726ae589534d663ce8d6067ab8fc61fa9a4b3
Author: Milan Crha <mcrha redhat com>
Date:   Mon Apr 16 11:01:21 2018 +0200

    Mute false-positive compiler warning about used uninitialized variable

 src/server/e-ews-calendar-utils.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/src/server/e-ews-calendar-utils.c b/src/server/e-ews-calendar-utils.c
index 19d2e38..c2cd203 100644
--- a/src/server/e-ews-calendar-utils.c
+++ b/src/server/e-ews-calendar-utils.c
@@ -916,8 +916,8 @@ e_ews_cal_utils_convert_recurrence (icalcomponent *icalcomp,
 
        case ICAL_YEARLY_RECURRENCE: {
                gint month_index = 1;
-               enum month_day_options month_day;
-               enum month_num_options month_num;
+               enum month_day_options month_day = MONTH_DAY_NTH;
+               enum month_num_options month_num = MONTH_NUM_DAY;
 
                if (n_by_year_day != 0 ||
                    n_by_week_no != 0 ||