[evolution-ews] I#31 - Duplicate attendees in meetings from Office365.com

[Milan Crha <mcrha src gnome org>]

commit ea3400e25d614943a2337cd881bd8b7699ab6717
Author: Milan Crha <mcrha redhat com>
Date:   Mon Jan 21 18:29:55 2019 +0100

    I#31 - Duplicate attendees in meetings from Office365.com
    
    Closes https://gitlab.gnome.org/GNOME/evolution-ews/issues/31

 src/calendar/e-cal-backend-ews.c | 8 ++++++++
 1 file changed, 8 insertions(+)
---
diff --git a/src/calendar/e-cal-backend-ews.c b/src/calendar/e-cal-backend-ews.c
index 72bf4d41..9eea63f5 100644
--- a/src/calendar/e-cal-backend-ews.c
+++ b/src/calendar/e-cal-backend-ews.c
@@ -742,6 +742,14 @@ ecb_ews_item_to_component_sync (ECalBackendEws *cbews,
                        gboolean is_response_requested = e_ews_item_get_is_response_requested (item);
                        gchar *user_email;
 
+                       /* Remove any existing attendees first (as Office365.com (and possibly Exchange 2016) 
includes them) */
+                       for (icalprop = icalcomponent_get_first_property (icalcomp, ICAL_ATTENDEE_PROPERTY);
+                            icalprop;
+                            icalprop = icalcomponent_get_first_property (icalcomp, ICAL_ATTENDEE_PROPERTY)) {
+                               icalcomponent_remove_property (icalcomp, icalprop);
+                               icalproperty_free (icalprop);
+                       }
+
                        user_email = camel_ews_settings_dup_email (ews_settings);
 
                        /* Attendees */