[gtk/gtk-3-24: 1/2] gdk quartz: add missing include

[John Ralls <jralls src gnome org>]

commit 528f78087106036f83f650c59dd69c85ce922711
Author: Thomas Holder <thomas holder schrodinger com>
Date:   Sat Feb 1 23:52:12 2020 +0100

    gdk quartz: add missing include
    
    Fixes startup crash with Inkscape.
    
    Regression of GNOME/gtk!641 (ef72fe750adc)

 gdk/quartz/gdkcursor-quartz.c | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/gdk/quartz/gdkcursor-quartz.c b/gdk/quartz/gdkcursor-quartz.c
index 26a9dffa88..ad9228f90c 100644
--- a/gdk/quartz/gdkcursor-quartz.c
+++ b/gdk/quartz/gdkcursor-quartz.c
@@ -24,6 +24,7 @@
 #include "gdkquartzcursor.h"
 #include "gdkprivate-quartz.h"
 #include "gdkinternal-quartz.h"
+#include "gdkquartz-gtk-only.h"
 
 #include "xcursors.h"