[gtk+] window accessible: Use GdkEvent API

[Carlos Garnacho <carlosg src gnome org>]

commit 9794dc5628573ec595122d563e45324b88930345
Author: Matthias Clasen <mclasen redhat com>
Date:   Sat Aug 26 10:50:50 2017 -0400

    window accessible: Use GdkEvent API

 gtk/a11y/gtkwindowaccessible.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)
---
diff --git a/gtk/a11y/gtkwindowaccessible.c b/gtk/a11y/gtkwindowaccessible.c
index 3941b38..572ee74 100644
--- a/gtk/a11y/gtkwindowaccessible.c
+++ b/gtk/a11y/gtkwindowaccessible.c
@@ -77,10 +77,12 @@ window_state_event_cb (GtkWidget           *widget,
                        GdkEventWindowState *event)
 {
   AtkObject* obj;
+  GdkWindowState changed, new_state;
 
+  gdk_event_get_window_state ((GdkEvent *)event, &changed, &new_state);
   obj = gtk_widget_get_accessible (widget);
   atk_object_notify_state_change (obj, ATK_STATE_ICONIFIED,
-                                  (event->new_window_state & GDK_WINDOW_STATE_ICONIFIED) != 0);
+                                  (new_state & GDK_WINDOW_STATE_ICONIFIED) != 0);
 
   return FALSE;
 }