[vala] add g_variant_unref to bindings

[Ryan Lortie <ryanl src gnome org>]

commit beb007ceab4a00eff2098c02a4575976a707f278
Author: Ryan Lortie <desrt desrt ca>
Date:   Thu Sep 3 11:59:37 2009 -0400

    add g_variant_unref to bindings
    
    note that if you call g_variant_unref() directly as a function then some
    versions of GCC have a bug that will cause invalid code to be emitted.
    this declaration is really only meant to be used as a callback.

 vapi/glib-2.0.vapi |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/vapi/glib-2.0.vapi b/vapi/glib-2.0.vapi
index 5be4d61..b659fb7 100644
--- a/vapi/glib-2.0.vapi
+++ b/vapi/glib-2.0.vapi
@@ -3261,6 +3261,8 @@ namespace GLib {
 	public static GLib.DestroyNotify g_object_unref;
 	[CCode (cname = "g_list_free")]
 	public static GLib.DestroyNotify g_list_free;
+	[CCode (cname = "((GDestroyNotify) g_variant_unref)")]
+	public static GLib.DestroyNotify g_variant_unref;
 
 	/* Strings */