[evolution-data-server] I#88 - Contacts with Birthday on Feb 29th Have No Appointment in Non-leap Years

[Milan Crha <mcrha src gnome org>]

commit 293ec68ffbec4cb73c3e5e07b64fd55a12caa132
Author: Milan Crha <mcrha redhat com>
Date:   Fri Feb 22 08:52:08 2019 +0100

    I#88 - Contacts with Birthday on Feb 29th Have No Appointment in Non-leap Years
    
    Closes https://gitlab.gnome.org/GNOME/evolution-data-server/issues/88

 src/calendar/backends/contacts/e-cal-backend-contacts.c | 6 ++++++
 1 file changed, 6 insertions(+)
---
diff --git a/src/calendar/backends/contacts/e-cal-backend-contacts.c 
b/src/calendar/backends/contacts/e-cal-backend-contacts.c
index c91079fba..de1716941 100644
--- a/src/calendar/backends/contacts/e-cal-backend-contacts.c
+++ b/src/calendar/backends/contacts/e-cal-backend-contacts.c
@@ -901,6 +901,7 @@ create_component (ECalBackendContacts *cbc,
        struct icalrecurrencetype  r;
        gchar                     *since_year;
        GSList recur_list;
+       gboolean is_leap_day;
 
        g_return_val_if_fail (E_IS_CAL_BACKEND_CONTACTS (cbc), NULL);
 
@@ -929,6 +930,9 @@ create_component (ECalBackendContacts *cbc,
        dt.tzid = NULL;
        e_cal_component_set_dtstart (cal_comp, &dt);
 
+       itt = icaltime_normalize (itt);
+       is_leap_day = itt.day == 29 && itt.month == 2;
+
        itt = cdate_to_icaltime (cdate);
        icaltime_adjust (&itt, 1, 0, 0, 0);
        dt.value = &itt;
@@ -940,6 +944,8 @@ create_component (ECalBackendContacts *cbc,
        icalrecurrencetype_clear (&r);
        r.freq = ICAL_YEARLY_RECURRENCE;
        r.interval = 1;
+       if (is_leap_day)
+               r.by_month_day[0] = -1;
        recur_list.data = &r;
        recur_list.next = NULL;
        e_cal_component_set_rrule_list (cal_comp, &recur_list);