From 9b73a9a4c907c75371c000ae8a9c50c80dfbccf9 Mon Sep 17 00:00:00 2001
From: euzuro <euzuro@metacarta.com>
Date: Fri, 6 Oct 2006 16:17:10 +0000
Subject: [PATCH] if there is no old base layer, dont try to get the zoom from
 it

git-svn-id: http://svn.openlayers.org/trunk/openlayers@1655 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
---
 lib/OpenLayers/Map.js | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/lib/OpenLayers/Map.js b/lib/OpenLayers/Map.js
index 9d8bbcc880..22e6ff9a0c 100644
--- a/lib/OpenLayers/Map.js
+++ b/lib/OpenLayers/Map.js
@@ -450,8 +450,11 @@ OpenLayers.Map.prototype = {
                 //redraw all layers
                 var center = this.getCenter();
                 if (center != null) {
-                    var oldResolution = oldBaseLayer.getResolution();
-                    var zoom = this.baseLayer.getZoomForResolution(oldResolution);
+                    var zoom = null;
+                    if (oldBaseLayer != null) {
+                        var oldResolution = oldBaseLayer.getResolution();
+                        zoom = this.baseLayer.getZoomForResolution(oldResolution);
+                    }
                     this.setCenter(center, zoom);            
                 }
                 if ((noEvent == null) || (noEvent == false)) {