[gtk/gtkaccessible] Seal the public member of GtkAccesible

Fixes https://bugzilla.gnome.org/show_bug.cgi?id=544892

diff --git a/gtk/gtkaccessible.h b/gtk/gtkaccessible.h
index b9dbf8b822fc58c3ef0d3373b09c8dd095b92331..5654a473aa4f12f3ec1c66baab56cfc50aa7ace8 100644 (file)
--- a/gtk/gtkaccessible.h
+++ b/gtk/gtkaccessible.h
@@ -50,7 +50,7 @@ struct _GtkAccessible
    * The GtkWidget whose properties and features are exported via this 
    * accessible instance.
    */
-  GtkWidget *widget;
+  GtkWidget *GSEAL (widget);
 };
 
 struct _GtkAccessibleClass