From c1a966bb6fc24f7966a1bad4b080adffc1252150 Mon Sep 17 00:00:00 2001
From: ahocevar <andreas.hocevar@gmail.com>
Date: Mon, 24 Feb 2014 13:55:20 +0100
Subject: [PATCH] namespaceURI can be null, but not undefined

---
 src/ol/xml.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/ol/xml.js b/src/ol/xml.js
index f682ec64fc..6f3728b0c5 100644
--- a/src/ol/xml.js
+++ b/src/ol/xml.js
@@ -59,7 +59,7 @@ ol.xml.createElementNS_ = function(namespaceURI, qualifiedName) {
  * @private
  */
 ol.xml.createElementNSActiveX_ = function(namespaceURI, qualifiedName) {
-  if (!goog.isDef(namespaceURI)) {
+  if (goog.isNull(namespaceURI)) {
     namespaceURI = '';
   }
   return ol.xml.DOCUMENT.createNode(1, qualifiedName, namespaceURI);