[vala/0.40] gstreamer-1.0: Fix direction of Gst.Iterator.fold() ret parameter

[Rico Tzschichholz <ricotz src gnome org>]

commit 368b2f77a116928f1f2b2d3c4c785caab47b9400
Author: Chris White <cxwembedded gmail com>
Date:   Wed Dec 23 11:14:51 2020 -0500

    gstreamer-1.0: Fix direction of Gst.Iterator.fold() ret parameter
    
    See https://gitlab.gnome.org/GNOME/vala/issues/1014

 vapi/gstreamer-1.0.vapi        | 2 +-
 vapi/metadata/Gst-1.0.metadata | 2 ++
 2 files changed, 3 insertions(+), 1 deletion(-)
---
diff --git a/vapi/gstreamer-1.0.vapi b/vapi/gstreamer-1.0.vapi
index fc1e6d22c..771a89a2c 100644
--- a/vapi/gstreamer-1.0.vapi
+++ b/vapi/gstreamer-1.0.vapi
@@ -1517,7 +1517,7 @@ namespace Gst {
                public Gst.Iterator filter<T> ([CCode (type = "GCompareFunc")] GLib.SearchFunc<GLib.Value?,T> 
func, T user_data);
                [CCode (simple_generics = true)]
                public bool find_custom<T> ([CCode (type = "GCompareFunc")] GLib.SearchFunc<GLib.Value?,T> 
func, out GLib.Value elem, T user_data);
-               public Gst.IteratorResult fold ([CCode (delegate_target_pos = 2.1)] Gst.IteratorFoldFunction 
func, GLib.Value ret);
+               public Gst.IteratorResult fold ([CCode (delegate_target_pos = 2.1)] Gst.IteratorFoldFunction 
func, ref GLib.Value ret);
                public Gst.IteratorResult @foreach (Gst.IteratorForeachFunction func);
                public void free ();
                public Gst.IteratorResult next (out GLib.Value elem);
diff --git a/vapi/metadata/Gst-1.0.metadata b/vapi/metadata/Gst-1.0.metadata
index a9952e092..73b0210cc 100644
--- a/vapi/metadata/Gst-1.0.metadata
+++ b/vapi/metadata/Gst-1.0.metadata
@@ -125,6 +125,8 @@ value_set_int_range_step.value ref
 value_set_structure.value ref
 ChildProxy
   .get_property.value ref
+Iterator
+  .fold.ret ref
 ValueArray
   .append_and_take_value.value ref
   .append_value.value ref