[gtk/gtk-3-24: 2/4] demos/gtk-demo/changedisplay: Remove deprecated gdk_flush

[Matthias Clasen <matthiasc src gnome org>]

commit de188592491b82b201166dd9ac10b0481089a614
Author: Yi-Soo An <yisooan gmail com>
Date:   Fri Jul 20 15:40:37 2018 +0900

    demos/gtk-demo/changedisplay: Remove deprecated gdk_flush
    
    Use gdk_display_flush instead of it.

 demos/gtk-demo/changedisplay.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/demos/gtk-demo/changedisplay.c b/demos/gtk-demo/changedisplay.c
index 37c364f3e8..fcb16090fe 100644
--- a/demos/gtk-demo/changedisplay.c
+++ b/demos/gtk-demo/changedisplay.c
@@ -151,7 +151,7 @@ query_for_toplevel (GdkScreen  *screen,
 
   g_object_unref (cursor);
   gtk_widget_destroy (popup);
-  gdk_flush ();                 /* Really release the grab */
+  gdk_display_flush (display);                 /* Really release the grab */
 
   return toplevel;
 }