From 40e83b925894643c3b088f73c7261411e45897d2 Mon Sep 17 00:00:00 2001
From: Tom Payne <twpayne@gmail.com>
Date: Tue, 17 Jul 2012 18:55:33 +0200
Subject: [PATCH] Don't redraw if center or resolution is not defined

---
 src/ol/webgl/map.js | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/ol/webgl/map.js b/src/ol/webgl/map.js
index 8ae5106a46..ece844a560 100644
--- a/src/ol/webgl/map.js
+++ b/src/ol/webgl/map.js
@@ -380,9 +380,13 @@ ol.webgl.Map.prototype.handleWebGLContextRestored = function() {
  */
 ol.webgl.Map.prototype.redrawInternal = function() {
 
-  var animate = goog.base(this, 'redrawInternal');
+  var center = this.getCenter();
+  var resolution = this.getResolution();
+  if (!goog.isDef(center) || !goog.isDef(resolution)) {
+    return false;
+  }
 
-  var gl = this.getGL();
+  var animate = goog.base(this, 'redrawInternal');
 
   this.forEachVisibleLayer(function(layer, layerRenderer) {
     if (layerRenderer.redraw()) {