[vala] gio-2.0: Fix Bus.own_name and own_name_on_connection bindings.

[Luca Bruno <lucabru src gnome org>]

commit 4198841f2df0985593942a9da786d2ace9b0921d
Author: Marco Trevisan (Treviño) <mail 3v1n0 net>
Date:   Tue Mar 1 15:26:37 2011 +0100

    gio-2.0: Fix Bus.own_name and own_name_on_connection bindings.

 vapi/gio-2.0.vapi                         |    4 ++--
 vapi/packages/gio-2.0/gio-2.0-custom.vala |    4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)
---
diff --git a/vapi/gio-2.0.vapi b/vapi/gio-2.0.vapi
index 7b606cf..c355f65 100644
--- a/vapi/gio-2.0.vapi
+++ b/vapi/gio-2.0.vapi
@@ -13,9 +13,9 @@ namespace GLib {
 		[CCode (cheader_filename = "gio/gio.h")]
 		public static GLib.DBusConnection get_sync (GLib.BusType bus_type, GLib.Cancellable? cancellable = null) throws GLib.IOError;
 		[CCode (cname = "g_bus_own_name_with_closures", cheader_filename = "gio/gio.h")]
-		public static uint own_name (GLib.BusType bus_type, string name, GLib.BusNameOwnerFlags flags, [CCode (type = "GClosure*")] owned GLib.BusAcquiredCallback bus_acquired_handler, [CCode (type = "GClosure*")] owned GLib.BusNameAcquiredCallback name_acquired_handler, [CCode (type = "GClosure*")] owned GLib.BusNameLostCallback name_lost_handler);
+		public static uint own_name (GLib.BusType bus_type, string name, GLib.BusNameOwnerFlags flags, [CCode (type = "GClosure*")] owned GLib.BusAcquiredCallback? bus_acquired_handler = null, [CCode (type = "GClosure*")] owned GLib.BusNameAcquiredCallback? name_acquired_handler = null, [CCode (type = "GClosure*")] owned GLib.BusNameLostCallback? name_lost_handler = null);
 		[CCode (cname = "g_bus_own_name_on_connection_with_closures", cheader_filename = "gio/gio.h")]
-		public static uint own_name_on_connection (GLib.DBusConnection connection, string name, GLib.BusNameOwnerFlags flags, [CCode (type = "GClosure*")] owned GLib.BusNameAcquiredCallback name_acquired_handler, [CCode (type = "GClosure*")] owned GLib.BusNameLostCallback name_lost_handler);
+		public static uint own_name_on_connection (GLib.DBusConnection connection, string name, GLib.BusNameOwnerFlags flags, [CCode (type = "GClosure*")] owned GLib.BusNameAcquiredCallback? name_acquired_handler = null, [CCode (type = "GClosure*")] owned GLib.BusNameLostCallback? name_lost_handler = null);
 		[CCode (cheader_filename = "gio/gio.h")]
 		public static void unown_name (uint owner_id);
 		[CCode (cheader_filename = "gio/gio.h")]
diff --git a/vapi/packages/gio-2.0/gio-2.0-custom.vala b/vapi/packages/gio-2.0/gio-2.0-custom.vala
index 28aef3b..74145e0 100644
--- a/vapi/packages/gio-2.0/gio-2.0-custom.vala
+++ b/vapi/packages/gio-2.0/gio-2.0-custom.vala
@@ -59,9 +59,9 @@ namespace GLib {
 		public async T get_proxy<T> (GLib.BusType bus_type, string name, string object_path, GLib.DBusProxyFlags flags = 0, GLib.Cancellable? cancellable = null) throws GLib.IOError;
 		public T get_proxy_sync<T> (GLib.BusType bus_type, string name, string object_path, GLib.DBusProxyFlags flags = 0, GLib.Cancellable? cancellable = null) throws GLib.IOError;
 		[CCode (cname = "g_bus_own_name_with_closures")]
-		public uint own_name (GLib.BusType bus_type, string name, GLib.BusNameOwnerFlags flags, [CCode (type = "GClosure*")] owned GLib.BusAcquiredCallback bus_acquired_handler, [CCode (type = "GClosure*")] owned GLib.BusNameAcquiredCallback name_acquired_handler, [CCode (type = "GClosure*")] owned GLib.BusNameLostCallback name_lost_handler);
+		public uint own_name (GLib.BusType bus_type, string name, GLib.BusNameOwnerFlags flags, [CCode (type = "GClosure*")] owned GLib.BusAcquiredCallback? bus_acquired_handler = null, [CCode (type = "GClosure*")] owned GLib.BusNameAcquiredCallback? name_acquired_handler = null, [CCode (type = "GClosure*")] owned GLib.BusNameLostCallback? name_lost_handler = null);
 		[CCode (cname = "g_bus_own_name_on_connection_with_closures")]
-		public uint own_name_on_connection (GLib.DBusConnection connection, string name, GLib.BusNameOwnerFlags flags, [CCode (type = "GClosure*")] owned GLib.BusNameAcquiredCallback name_acquired_handler, [CCode (type = "GClosure*")] owned GLib.BusNameLostCallback name_lost_handler);
+		public uint own_name_on_connection (GLib.DBusConnection connection, string name, GLib.BusNameOwnerFlags flags, [CCode (type = "GClosure*")] owned GLib.BusNameAcquiredCallback? name_acquired_handler = null, [CCode (type = "GClosure*")] owned GLib.BusNameLostCallback? name_lost_handler = null);
 		public void unown_name (uint owner_id);
 		public void unwatch_name (uint watcher_id);
 		[CCode (cname = "g_bus_watch_name_with_closures")]