From 4beb48fa3d41231106d5fad33251fd7b01087210 Mon Sep 17 00:00:00 2001
From: Tom Payne <twpayne@gmail.com>
Date: Tue, 28 Jan 2014 14:37:38 +0100
Subject: [PATCH] Assert that pixel is non-null when positioning overlay

---
 src/ol/overlay.js | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/ol/overlay.js b/src/ol/overlay.js
index bd81f321c7..17081ba375 100644
--- a/src/ol/overlay.js
+++ b/src/ol/overlay.js
@@ -335,6 +335,7 @@ ol.Overlay.prototype.updatePixelPosition_ = function() {
   }
 
   var pixel = map.getPixelFromCoordinate(position);
+  goog.asserts.assert(!goog.isNull(pixel));
   var mapSize = map.getSize();
   goog.asserts.assert(goog.isDef(mapSize));
   var style = this.element_.style;