From 5b2d29878b77864d7274a3b086b2c5978b07de8a Mon Sep 17 00:00:00 2001
From: Tim Schaub <tim.schaub@gmail.com>
Date: Fri, 22 Jun 2012 17:38:39 +0200
Subject: [PATCH] Tile may be null.

---
 src/ol/renderer/TileLayerRenderer.js | 20 ++++++++++++--------
 1 file changed, 12 insertions(+), 8 deletions(-)

diff --git a/src/ol/renderer/TileLayerRenderer.js b/src/ol/renderer/TileLayerRenderer.js
index d70ff6c8c8..f7cbc9d393 100644
--- a/src/ol/renderer/TileLayerRenderer.js
+++ b/src/ol/renderer/TileLayerRenderer.js
@@ -183,19 +183,23 @@ ol.renderer.TileLayerRenderer.prototype.draw = function(center, resolution) {
         }
         for (var j=0; j<numTilesHigh; ++j) {
             tileY = topTileY + (j * yDown);
-            tile = this.layer_.getTileForXYZ(tileX, tileY, tileZ);
-            img = tile.getImg();
-            img.style.top = pxTileTop + "px";
-            img.style.left = pxTileLeft + "px";
             if (scale !== 1) {
                 pxTileBottom = Math.round(pxMinY + ((j+1) * pxTileHeight));
-                img.style.height = (pxTileRight - pxTileLeft) + "px";
-                img.style.width = (pxTileBottom - pxTileTop) + "px";
             } else {
                 pxTileBottom = pxTileTop + pxTileHeight;
             }
-            tile.load();
-            fragment.appendChild(img);
+            tile = this.layer_.getTileForXYZ(tileX, tileY, tileZ);
+            if (tile != null) {
+                img = tile.getImg();
+                img.style.top = pxTileTop + "px";
+                img.style.left = pxTileLeft + "px";
+                if (scale !== 1) {
+                    img.style.height = (pxTileRight - pxTileLeft) + "px";
+                    img.style.width = (pxTileBottom - pxTileTop) + "px";
+                }
+                tile.load();
+                fragment.appendChild(img);
+            }
             pxTileTop = pxTileBottom;
         }
         pxTileLeft = pxTileRight;