x11: Ignore stray DestroyNotify events

There's no use in making a delete event with a
NULL surface. Just ignore such events.

Fixes: #3006

diff --git a/gdk/x11/gdkdisplay-x11.c b/gdk/x11/gdkdisplay-x11.c
index e895a07867f91dc280b5865f8309561776db3995..a2bcefa67dd196378207db03b8742566aed6cf7f 100644 (file)
--- a/gdk/x11/gdkdisplay-x11.c
+++ b/gdk/x11/gdkdisplay-x11.c
@@ -795,7 +795,8 @@ gdk_x11_display_translate_event (GdkEventTranslator *translator,
 
       if (!is_substructure)
        {
-          event = gdk_delete_event_new (surface);
+          if (surface)
+            event = gdk_delete_event_new (surface);
 
          if (surface && GDK_SURFACE_XID (surface) != x11_screen->xroot_window)
            gdk_surface_destroy_notify (surface);