[vala] gtk+-3.0: Fix lost GLib.InitiallyUnowned inheritance of Gtk.Widget

[Rico Tzschichholz <ricotz src gnome org>]

commit 8d21d10ea0e5b0e6ecfb46a308a7ba01374272ab
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Sun Dec 10 23:07:48 2017 +0100

    gtk+-3.0: Fix lost GLib.InitiallyUnowned inheritance of Gtk.Widget

 vapi/gtk+-3.0.vapi                |    2 +-
 vapi/metadata/Gtk-3.0-custom.vala |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/vapi/gtk+-3.0.vapi b/vapi/gtk+-3.0.vapi
index e810129..6e8f17c 100644
--- a/vapi/gtk+-3.0.vapi
+++ b/vapi/gtk+-3.0.vapi
@@ -9298,7 +9298,7 @@ namespace Gtk {
                public bool use_symbolic { get; set construct; }
        }
        [CCode (cheader_filename = "gtk/gtk.h", type_id = "gtk_widget_get_type ()")]
-       public class Widget : GLib.Object, Atk.Implementor, Gtk.Buildable {
+       public class Widget : GLib.InitiallyUnowned, Atk.Implementor, Gtk.Buildable {
                [CCode (construct_function = "gtk_widget_new", has_new_function = false)]
                public Widget (...);
                public bool activate ();
diff --git a/vapi/metadata/Gtk-3.0-custom.vala b/vapi/metadata/Gtk-3.0-custom.vala
index f58b74c..ced90d6 100644
--- a/vapi/metadata/Gtk-3.0-custom.vala
+++ b/vapi/metadata/Gtk-3.0-custom.vala
@@ -94,7 +94,7 @@ namespace Gtk {
        }
 
        [CCode (type_id = "gtk_widget_get_type ()")]
-       public class Widget : GLib.Object {
+       public class Widget : GLib.InitiallyUnowned {
                [CCode (construct_function = "gtk_widget_new", has_new_function = false)]
                public Widget (...);
                [NoWrapper, Version (deprecated = true), CCode (vfunc_name = 
"get_preferred_height_for_width")]