[gtk+] docs: fix docs for ActionBar

[William Jon McCann <mccann src gnome org>]

commit 0192bb386cb85dcb3d301504bfaa3a432c7b12bf
Author: William Jon McCann <william jon mccann gmail com>
Date:   Tue Jan 21 12:40:46 2014 -0500

    docs: fix docs for ActionBar

 gtk/gtkactionbar.h |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtkactionbar.h b/gtk/gtkactionbar.h
index 6efbb77..c338a45 100644
--- a/gtk/gtkactionbar.h
+++ b/gtk/gtkactionbar.h
@@ -41,11 +41,13 @@ typedef struct _GtkActionBarClass         GtkActionBarClass;
 
 struct _GtkActionBar
 {
+  /*< private >*/
   GtkContainer container;
 };
 
 struct _GtkActionBarClass
 {
+  /*< private >*/
   GtkContainerClass parent_class;
 
   /* Padding for future expansion */