PointerEventHandler exception with Overlay containing SVG

Using an ol.Overlay as marker I put inside an SVG graphic element. As soon I move the mouse over the SVG the error appear.
In IE9 the SVG Element does not have the contains function so it throws the exception, on the contrary using goog.dom.contains it handles the cross-browser issues.

https://groups.google.com/forum/#!topic/ol3-dev/DBi2HCTqulU

src/ol/pointer/pointereventhandler.js

@@ -31,6 +31,7 @@
 goog.provide('ol.pointer.PointerEventHandler');
 
 goog.require('goog.array');
+goog.require('goog.dom');
 goog.require('goog.events');
 goog.require('goog.events.BrowserEvent');
 goog.require('goog.events.Event');
@@ -367,7 +368,10 @@ ol.pointer.PointerEventHandler.prototype.enterOver =
  */
 ol.pointer.PointerEventHandler.prototype.contains_ =
     function(container, contained) {
-  return container.contains(contained);
+  if (goog.isNull(contained)) {
+    return false;
+  }
+  return goog.dom.contains(container, contained);
 };