From a405279f340bfca0525f1d46e1cbbfcd1bdfe5be Mon Sep 17 00:00:00 2001
From: ahocevar <andreas.hocevar@gmail.com>
Date: Mon, 24 Jun 2013 10:35:02 +0200
Subject: [PATCH] Click handler called with empty event object on Android

On Android (both native browser and Chrome), the handleTouchEnd_
method is sometimes reached in a state where this.down_ is null.
This check protects against this.click_ being called without
an event object. To see this issue, open any example in Android,
and tap the zoom + or - button.
---
 src/ol/mapbrowserevent.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/ol/mapbrowserevent.js b/src/ol/mapbrowserevent.js
index eadac888fb..a277ea6057 100644
--- a/src/ol/mapbrowserevent.js
+++ b/src/ol/mapbrowserevent.js
@@ -373,7 +373,9 @@ ol.MapBrowserEventHandler.prototype.handleTouchEnd_ = function(browserEvent) {
     } else {
       this.timestamp_ = 0;
     }
-    this.click_(this.down_);
+    if (!goog.isNull(this.down_)) {
+      this.click_(this.down_);
+    }
   }
   this.down_ = null;
 };