Make sure an auto-accept change during an attendee refresh causes the…

… time range index to be updated.

git-svn-id: https://svn.calendarserver.org/repository/calendarserver/CalendarServer/branches/release/CalendarServer-4.3-dev@10817 e27351fd-9f3e-4f54-a53b-843176b1656c

twistedcaldav/scheduling/processing.py

@@ -527,7 +527,7 @@ def doImplicitAttendeeRequest(self):
                     store_inbox = True
 
                 # Let the store know that no time-range info has changed for a refresh
-                if hasattr(self.request, "doing_attendee_refresh"):
+                if hasattr(self.request, "doing_attendee_refresh") and not send_reply:
                     new_calendar.noInstanceIndexing = True
 
                 # Update the attendee's copy of the event