From 8e555dee560d77bcef5755841143d5c11928ab2a Mon Sep 17 00:00:00 2001
From: Tim Schaub <tim.schaub@gmail.com>
Date: Thu, 21 Feb 2013 12:12:12 -0700
Subject: [PATCH] Overriding createBackBuffer in UTFGrid layer

This layer doesn't need to create a backbuffer.
---
 lib/OpenLayers/Layer/UTFGrid.js | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/lib/OpenLayers/Layer/UTFGrid.js b/lib/OpenLayers/Layer/UTFGrid.js
index 51db26402c..c6448816c4 100644
--- a/lib/OpenLayers/Layer/UTFGrid.js
+++ b/lib/OpenLayers/Layer/UTFGrid.js
@@ -109,6 +109,12 @@ OpenLayers.Layer.UTFGrid = OpenLayers.Class(OpenLayers.Layer.XYZ, {
             utfgridResolution: this.utfgridResolution
         }, this.tileOptions);
     },
+
+    /**
+     * Method: createBackBuffer
+     * The UTFGrid cannot create a back buffer, so this method is overriden.
+     */
+    createBackBuffer: function() {},
     
     /**
      * APIMethod: clone