From 251e9a09fa13ed967c3c45eca42afe39505295c7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89ric=20Lemoine?= <eric.lemoine@gmail.com>
Date: Thu, 7 Mar 2013 12:41:15 +0100
Subject: [PATCH] Fix js error when image source has no attributions

---
 src/ol/renderer/layerrenderer.js | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/src/ol/renderer/layerrenderer.js b/src/ol/renderer/layerrenderer.js
index a0a8f4b932..f48ec2e312 100644
--- a/src/ol/renderer/layerrenderer.js
+++ b/src/ol/renderer/layerrenderer.js
@@ -231,11 +231,13 @@ ol.renderer.Layer.prototype.scheduleExpireCache =
  */
 ol.renderer.Layer.prototype.updateAttributions =
     function(attributionsSet, attributions) {
-  var i;
-  var attribution;
-  for (i = 0; i < attributions.length; ++i) {
-    attribution = attributions[i];
-    attributionsSet[goog.getUid(attribution).toString()] = attribution;
+  if (goog.isDefAndNotNull(attributions)) {
+    var i;
+    var attribution;
+    for (i = 0; i < attributions.length; ++i) {
+      attribution = attributions[i];
+      attributionsSet[goog.getUid(attribution).toString()] = attribution;
+    }
   }
 };