[gxml] GomElement: Fixed detection of xmlns redefinition

[Daniel Espinosa Ortiz <despinosa src gnome org>]

commit c7a3a60bea22add99f3a263bca0e085e737c7363
Author: Daniel Espinosa <esodan gmail com>
Date:   Thu Nov 3 13:31:06 2016 -0600

    GomElement: Fixed detection of xmlns redefinition

 gxml/GomElement.vala |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gxml/GomElement.vala b/gxml/GomElement.vala
index 9dcac24..e32fb0b 100644
--- a/gxml/GomElement.vala
+++ b/gxml/GomElement.vala
@@ -312,7 +312,7 @@ public class GXml.GomElement : GomNode,
           string nsprefix = _element.lookup_prefix (node.node_value);
           string nsuri = _element.lookup_namespace_uri (node.node_name);
           if ((nsprefix != null || nsuri != null)
-              && (nsprefix != (node as DomAttr).prefix
+              && (nsprefix != (node as DomAttr).local_name
                   || nsuri != node.node_value)) {
             GLib.message ("Prefix: "+nsprefix+" Prefix Attr:"+(node as DomAttr).local_name);
             throw new DomError.NAMESPACE_ERROR