[dconf] Fix signature of Gtk.TreeModel.iter_nth_child and Gtk.TreeModel.iter_parent

[Robert Ancell <rancell src gnome org>]

commit de68de8fda7c23cfa1941a332a618db7ab2de23d
Author: Robert Ancell <robert ancell canonical com>
Date:   Fri Apr 5 09:34:14 2013 +1300

    Fix signature of Gtk.TreeModel.iter_nth_child and Gtk.TreeModel.iter_parent

 editor/dconf-model.vala |   15 +++++++++++----
 1 files changed, 11 insertions(+), 4 deletions(-)
---
diff --git a/editor/dconf-model.vala b/editor/dconf-model.vala
index 9c8cc18..c2fcd30 100644
--- a/editor/dconf-model.vala
+++ b/editor/dconf-model.vala
@@ -412,8 +412,10 @@ public class KeyModel: GLib.Object, Gtk.TreeModel
             return 0;
     }
 
-    public bool iter_nth_child(ref Gtk.TreeIter iter, Gtk.TreeIter? parent, int n)
+    public bool iter_nth_child(out Gtk.TreeIter iter, Gtk.TreeIter? parent, int n)
     {
+        iter = Gtk.TreeIter ();
+
         if (parent != null)
             return false;
 
@@ -423,8 +425,9 @@ public class KeyModel: GLib.Object, Gtk.TreeModel
         return true;
     }
 
-    public bool iter_parent(ref Gtk.TreeIter iter, Gtk.TreeIter child)
+    public bool iter_parent(out Gtk.TreeIter iter, Gtk.TreeIter child)
     {
+        iter = Gtk.TreeIter ();
         return false;
     }
 
@@ -534,8 +537,10 @@ public class EnumModel: GLib.Object, Gtk.TreeModel
             return 0;
     }
 
-    public bool iter_nth_child(ref Gtk.TreeIter iter, Gtk.TreeIter? parent, int n)
+    public bool iter_nth_child(out Gtk.TreeIter iter, Gtk.TreeIter? parent, int n)
     {
+        iter = Gtk.TreeIter ();
+
         if (parent != null)
             return false;
 
@@ -703,8 +708,10 @@ public class SettingsModel: GLib.Object, Gtk.TreeModel
         return (int) get_directory(iter).children.length();
     }
 
-    public bool iter_nth_child(ref Gtk.TreeIter iter, Gtk.TreeIter? parent, int n)
+    public bool iter_nth_child(out Gtk.TreeIter iter, Gtk.TreeIter? parent, int n)
     {
+        iter = Gtk.TreeIter ();
+
         Directory directory = get_directory(parent);
         if (n >= directory.children.length())
             return false;