[gtk/gtk-2-24] Include gdkquartz.h in gtkclipboard-quartz.c

[John Ralls <jralls src gnome org>]

commit 5f104c98836ad1a950717fcf705b6d4cd880e6ba
Author: John Ralls <jralls ceridwen us>
Date:   Mon Sep 14 13:19:09 2020 -0700

    Include gdkquartz.h in gtkclipboard-quartz.c
    
    to declare gdk_quartz_pasteboard_type_to_atom_libgtk_only.
    
    Closes https://gitlab.gnome.org/GNOME/gtk/-/issues/3161

 gtk/gtkclipboard-quartz.c | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/gtk/gtkclipboard-quartz.c b/gtk/gtkclipboard-quartz.c
index 5a61838678..29b2665322 100644
--- a/gtk/gtkclipboard-quartz.c
+++ b/gtk/gtkclipboard-quartz.c
@@ -33,6 +33,7 @@
 #include "gtktextbuffer.h"
 #include "gtkquartz.h"
 #include "gtkalias.h"
+#include <gdk/quartz/gdkquartz.h>
 
 enum {
   OWNER_CHANGE,