[california] Honor master event's timezone when editing RRULEs: Bug #741624

[Jim Nelson <jnelson src gnome org>]

commit 77a6f87236cc960ea97cea988f9347c1a836c1eb
Author: Jim Nelson <jim yorba org>
Date:   Tue Jan 6 17:44:01 2015 -0800

    Honor master event's timezone when editing RRULEs: Bug #741624

 src/event-editor/event-editor-recurring-card.vala |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)
---
diff --git a/src/event-editor/event-editor-recurring-card.vala 
b/src/event-editor/event-editor-recurring-card.vala
index 208bf7f..97267c3 100644
--- a/src/event-editor/event-editor-recurring-card.vala
+++ b/src/event-editor/event-editor-recurring-card.vala
@@ -257,8 +257,9 @@ public class RecurringCard : Gtk.Grid, Toolkit.Card {
         // "Ends ... After" entry
         after_entry.text = "1";
         
-        // "Starts" and "Ends...On" entries
-        Calendar.DateSpan event_span = master.get_event_date_span(Calendar.Timezone.local);
+        // "Starts" and "Ends...On" entries ... use a null Timezone because want all information
+        // here to be in the timezone of the master's DTSTART, which RRULEs are sensitive to
+        Calendar.DateSpan event_span = master.get_event_date_span(null);
         start_date = event_span.start_date;
         end_date = event_span.end_date;