[gxml] Ported SerializableGeeDualKeyMap serialize to TwDocument

[Daniel Espinosa Ortiz <despinosa src gnome org>]

commit 82bf566149c8ff243f27f52c5e080b6d07d63811
Author: Daniel Espinosa <esodan gmail com>
Date:   Tue May 12 10:01:44 2015 -0500

    Ported SerializableGeeDualKeyMap serialize to TwDocument

 test/SerializableGeeDualKeyMapTest.vala |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/test/SerializableGeeDualKeyMapTest.vala b/test/SerializableGeeDualKeyMapTest.vala
index e62d2d4..f1fcd1a 100644
--- a/test/SerializableGeeDualKeyMapTest.vala
+++ b/test/SerializableGeeDualKeyMapTest.vala
@@ -142,7 +142,7 @@ class SerializableGeeDualKeyMapTest : GXmlTest
         c.set (o2.owner, o2.name, o2);
         c.set (o3.owner, o3.name, o3);
         c.set (o4.owner, o4.name, o4);
-        var doc = new xDocument ();
+        var doc = new TwDocument ();
         var root = doc.create_element ("root");
         doc.childs.add (root);
         c.serialize ( (xNode) root);