From 5ae65d413a75e7846b9220c77f02fe63435d17d3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89ric=20Lemoine?= <eric.lemoine@gmail.com>
Date: Sun, 16 Oct 2011 22:40:11 +0200
Subject: [PATCH] the layer may not be in the map anymore when a tile is
 received

---
 lib/OpenLayers/Layer/Grid.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/OpenLayers/Layer/Grid.js b/lib/OpenLayers/Layer/Grid.js
index 3852c30a2b..dc0a0f8320 100644
--- a/lib/OpenLayers/Layer/Grid.js
+++ b/lib/OpenLayers/Layer/Grid.js
@@ -886,7 +886,9 @@ OpenLayers.Layer.Grid = OpenLayers.Class(OpenLayers.Layer.HTTPRequest, {
                     this.div.removeChild(this.backBuffer);
                     this.backBuffer = null;
                 }
-                this.lastResolution = this.getServerResolution();
+                if(this.map) {
+                    this.lastResolution = this.getServerResolution();
+                }
             }
         };
         tile.events.register("loadend", this, tile.onLoadEnd);