From 7be8a735fa0a9f30b942d6d1f60e52c82ee092e4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89ric=20Lemoine?= <eric.lemoine@gmail.com>
Date: Tue, 14 Aug 2012 07:26:43 +0200
Subject: [PATCH] better code (thanks @twpayne)

---
 src/ol/base/createmap.js | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/src/ol/base/createmap.js b/src/ol/base/createmap.js
index 304005cdd6..8ed5ae62bb 100644
--- a/src/ol/base/createmap.js
+++ b/src/ol/base/createmap.js
@@ -134,16 +134,18 @@ ol.createMap = function(target, opt_values, opt_rendererHints) {
     if (rendererHint == ol.RendererHint.DOM) {
       if (ol.ENABLE_DOM && ol.dom.isSupported()) {
         rendererConstructor = ol.dom.MapRenderer;
-        return new ol.Map(target, rendererConstructor, values);
       }
     } else if (rendererHint == ol.RendererHint.WEBGL) {
       if (ol.ENABLE_WEBGL && ol.webgl.isSupported()) {
         rendererConstructor = ol.webgl.MapRenderer;
-        return new ol.Map(target, rendererConstructor, values);
       }
     }
   }
 
-  return null;
+  if (goog.isDef(rendererConstructor)) {
+    return new ol.Map(target, rendererConstructor, values);
+  } else {
+    return null;
+  }
 
 };