[gtk+] gtkiconhelper: Add _gtk_icon_helper_ensure_surface to private header

[Alexander Larsson <alexl src gnome org>]

commit 9bde6b10ef7b23918112eb37958867cfb2f812e6
Author: Alexander Larsson <alexl redhat com>
Date:   Wed Aug 7 10:52:12 2013 +0200

    gtkiconhelper: Add _gtk_icon_helper_ensure_surface to private header

 gtk/gtkiconhelperprivate.h |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtkiconhelperprivate.h b/gtk/gtkiconhelperprivate.h
index e7136ac..833d8df 100644
--- a/gtk/gtkiconhelperprivate.h
+++ b/gtk/gtkiconhelperprivate.h
@@ -119,6 +119,8 @@ cairo_surface_t *_gtk_icon_helper_peek_surface (GtkIconHelper *self);
 const gchar *_gtk_icon_helper_get_stock_id (GtkIconHelper *self);
 const gchar *_gtk_icon_helper_get_icon_name (GtkIconHelper *self);
 
+cairo_surface_t *_gtk_icon_helper_ensure_surface (GtkIconHelper *self,
+                                                 GtkStyleContext *context);
 GdkPixbuf *_gtk_icon_helper_ensure_pixbuf (GtkIconHelper *self,
                                            GtkStyleContext *context);
 void _gtk_icon_helper_get_size (GtkIconHelper *self,