[gtk+] inspector: include private gdk headers

[Matthias Clasen <matthiasc src gnome org>]

commit 5442293ce740a8d0a48d8112cbd7d17c9a134084
Author: Matthias Clasen <mclasen redhat com>
Date:   Fri Nov 7 07:11:38 2014 -0500

    inspector: include private gdk headers
    
    ...the advantages of living in the same tree.

 gtk/inspector/visual.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/gtk/inspector/visual.c b/gtk/inspector/visual.c
index 8c8678c..8a4dd16 100644
--- a/gtk/inspector/visual.c
+++ b/gtk/inspector/visual.c
@@ -33,6 +33,8 @@
 #include "x11/gdkx.h"
 #endif
 
+#include "gdk/gdkinternals.h"
+
 struct _GtkInspectorVisualPrivate
 {
   GtkWidget *visual_box;