[gnome-calendar/wip/mcrha/gcal-event-construct] gcal-event: Workaround bug in libical-glib before 3.0.12 version

[Milan Crha <mcrha src gnome org>]

commit c11a87e5f943756e3e570cf51cdab3cd209635b7
Author: Milan Crha <mcrha redhat com>
Date:   Wed Feb 2 13:06:55 2022 +0100

    gcal-event: Workaround bug in libical-glib before 3.0.12 version
    
    Even the is_daylight argument is optional, the libical-glib had a bug
    to require it. No need to bump the dependency, just workaround the problem.

 src/core/gcal-event.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)
---
diff --git a/src/core/gcal-event.c b/src/core/gcal-event.c
index bbeacf83..bf44a5b7 100644
--- a/src/core/gcal-event.c
+++ b/src/core/gcal-event.c
@@ -197,8 +197,10 @@ get_timezone_from_ical (GcalEvent             *self,
     {
       g_autofree gchar *tzid = NULL;
       gint offset;
+      gint is_daylight = 0;
 
-      offset = i_cal_timezone_get_utc_offset (zone, itt, NULL);
+      /* The 'is_daylight' is not used, it's here to workaround a bug in pre-3.0.12 libical-glib */
+      offset = i_cal_timezone_get_utc_offset (zone, itt, &is_daylight);
       tzid = format_utc_offset (offset);
       tz = g_time_zone_new_identifier (tzid);
     }