Make VML Renderer use namespace set in this.xmlns, instead of hardcoding it

in two places. From fredj. (Closes #1002)


git-svn-id: http://svn.openlayers.org/trunk/openlayers@4675 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Renderer/VML.js

@@ -35,7 +35,7 @@ OpenLayers.Renderer.VML = OpenLayers.Class(OpenLayers.Renderer.Elements, {
         if (!this.supported()) { 
             return; 
         } 
-        document.namespaces.add("v", "urn:schemas-microsoft-com:vml");
+        document.namespaces.add("v", this.xmlns);
         var style = document.createStyleSheet();
         style.addRule('v\\:*', "behavior: url(#default#VML); " +
                                "position: relative; display: inline-block;");