[gtk/wip/nacho/quartz-frame-clock: 20/20] Fix typo on cast causing a crash

[Ignacio Casal Quinteiro <icq src gnome org>]

commit 09c65f4b1440e0998229337268ed09fa21c9e381
Author: Ignacio Casal Quinteiro <qignacio amazon com>
Date:   Thu Apr 11 17:58:21 2019 +0200

    Fix typo on cast causing a crash

 gdk/quartz/gdkdisplay-quartz.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/gdk/quartz/gdkdisplay-quartz.c b/gdk/quartz/gdkdisplay-quartz.c
index c2964fb171..c4675429e5 100644
--- a/gdk/quartz/gdkdisplay-quartz.c
+++ b/gdk/quartz/gdkdisplay-quartz.c
@@ -89,7 +89,7 @@ _gdk_quartz_display_add_frame_callback (GdkDisplay             *display,
                                         GdkWindow              *window)
 {
   GdkQuartzDisplay *display_quartz;
-  GdkWindowImplQuartz *impl = GDK_WINDOW_IMPL_QUARTZ (window);
+  GdkWindowImplQuartz *impl = GDK_WINDOW_IMPL_QUARTZ (window->impl);
 
   display_quartz = GDK_QUARTZ_DISPLAY (display);