[vala] gstreamer-0.10: Fix gst_iterator_fold binding

[Jürg Billeter <juergbi src gnome org>]

commit 37e6d1d76b37bd27ce68a1464baecb6b7298b0d6
Author: Víctor Manuel Jáquez Leal <vjaquez igalia com>
Date:   Sat Jun 6 20:36:46 2009 +0200

    gstreamer-0.10: Fix gst_iterator_fold binding
    
    Fixes bug 585588.

 vapi/gstreamer-0.10.vapi                           |    2 +-
 .../gstreamer-0.10/gstreamer-0.10.metadata         |    1 +
 2 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/vapi/gstreamer-0.10.vapi b/vapi/gstreamer-0.10.vapi
index a9a0a4f..75f793c 100644
--- a/vapi/gstreamer-0.10.vapi
+++ b/vapi/gstreamer-0.10.vapi
@@ -568,7 +568,7 @@ namespace Gst {
 		public GLib.Type type;
 		public unowned Gst.Iterator filter (GLib.CompareFunc func);
 		public void* find_custom (GLib.CompareFunc func);
-		public Gst.IteratorResult fold (Gst.IteratorFoldFunction func, Gst.Value ret);
+		public Gst.IteratorResult fold (Gst.IteratorFoldFunction func, Gst.Value? ret);
 		public Gst.IteratorResult @foreach (GLib.Func func);
 		[CCode (has_construct_function = false)]
 		public Iterator.list (GLib.Type type, GLib.Mutex @lock, uint32 master_cookie, GLib.List list, void* owner, Gst.IteratorItemFunction item, Gst.IteratorDisposeFunction free);
diff --git a/vapi/packages/gstreamer-0.10/gstreamer-0.10.metadata b/vapi/packages/gstreamer-0.10/gstreamer-0.10.metadata
index 1aa3573..310c154 100644
--- a/vapi/packages/gstreamer-0.10/gstreamer-0.10.metadata
+++ b/vapi/packages/gstreamer-0.10/gstreamer-0.10.metadata
@@ -141,6 +141,7 @@ gst_init_get_option_group transfer_ownership="1"
 gst_iterator_free hidden="1"
 gst_iterator_next hidden="1"
 gst_iterator_resync hidden="1"
+gst_iterator_fold.ret nullable="1"
 GstMessage base_class="GstMiniObject"
 GstMessage.mini_object hidden="1"
 GstMessageClass base_class="GstMiniObjectClass"