[gtk+] Avoid an unintented export

[Matthias Clasen <matthiasc src gnome org>]

commit e0f2492ce8e2c9cae2bb7e2bde97842eda588dbb
Author: Matthias Clasen <mclasen redhat com>
Date:   Tue Sep 18 13:36:35 2012 -0400

    Avoid an unintented export
    
    GtkStyleCascade is entirely private, so don't leak any symbols.

 gtk/gtkstylecascade.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gtk/gtkstylecascade.c b/gtk/gtkstylecascade.c
index 9ccd2f0..9f54e37 100644
--- a/gtk/gtkstylecascade.c
+++ b/gtk/gtkstylecascade.c
@@ -172,7 +172,7 @@ gtk_style_cascade_get_color (GtkStyleProviderPrivate *provider,
   return NULL;
 }
 
-GtkCssKeyframes *
+static GtkCssKeyframes *
 gtk_style_cascade_get_keyframes (GtkStyleProviderPrivate *provider,
                                  const char              *name)
 {