From 12b0fee7903339d8a18c51334d917814df432903 Mon Sep 17 00:00:00 2001
From: tsauerwein <tobias.sauerwein@camptocamp.com>
Date: Wed, 26 Feb 2014 13:51:50 +0100
Subject: [PATCH] pointer interaction might also receive events that are not
 pointer events

---
 src/ol/interaction/pointerinteraction.js | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/ol/interaction/pointerinteraction.js b/src/ol/interaction/pointerinteraction.js
index 30437dc6d3..e25e4d6875 100644
--- a/src/ol/interaction/pointerinteraction.js
+++ b/src/ol/interaction/pointerinteraction.js
@@ -129,7 +129,10 @@ ol.interaction.PointerInteraction.prototype.handlePointerDown =
  */
 ol.interaction.PointerInteraction.prototype.handleMapBrowserEvent =
     function(mapBrowserEvent) {
-  goog.asserts.assertInstanceof(mapBrowserEvent, ol.MapBrowserPointerEvent);
+  if (!(mapBrowserEvent instanceof ol.MapBrowserPointerEvent)) {
+    return true;
+  }
+
   var mapBrowserPointerEvent =
       /** @type {ol.MapBrowserPointerEvent} */ (mapBrowserEvent);