[gtk+] GTK Notebook: use the right enum type

[Ben Iofel <beniofel src gnome org>]

commit 7e5952c4eae948575f294fe567107817208739dc
Author: Ben Iofel <iofelben gmail com>
Date:   Mon Jan 11 19:13:30 2016 -0500

    GTK Notebook: use the right enum type

 gtk/gtknotebook.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gtk/gtknotebook.c b/gtk/gtknotebook.c
index b32c993..f0eef00 100644
--- a/gtk/gtknotebook.c
+++ b/gtk/gtknotebook.c
@@ -3497,7 +3497,7 @@ update_arrow_nodes (GtkNotebook *notebook)
 {
   GtkNotebookPrivate *priv = notebook->priv;
   gboolean arrow[4];
-  GtkImageType up_image_type, down_image_type;
+  GtkCssImageBuiltinType up_image_type, down_image_type;
   const char *style_property_name;
   GtkCssNode *tabs_node;
   gint i;