From 91c448d63def43a9520f4f12591a4dfc4ea8c0bf Mon Sep 17 00:00:00 2001
From: Tom Payne <twpayne@gmail.com>
Date: Fri, 8 Nov 2013 03:03:43 +0100
Subject: [PATCH] Allow z index to be undefined

---
 src/ol/replay/canvas/canvasbatchgroup.js | 2 +-
 src/ol/replay/ibatchgroup.js             | 2 +-
 src/ol/style.js                          | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/ol/replay/canvas/canvasbatchgroup.js b/src/ol/replay/canvas/canvasbatchgroup.js
index b9b23069b7..68afd68682 100644
--- a/src/ol/replay/canvas/canvasbatchgroup.js
+++ b/src/ol/replay/canvas/canvasbatchgroup.js
@@ -325,7 +325,7 @@ ol.replay.canvas.BatchGroup.prototype.finish = function() {
  * @inheritDoc
  */
 ol.replay.canvas.BatchGroup.prototype.getBatch = function(zIndex, batchType) {
-  var zIndexKey = zIndex.toString();
+  var zIndexKey = goog.isDef(zIndex) ? zIndex.toString() : '0';
   var batches = this.batchesByZIndex_[zIndexKey];
   if (!goog.isDef(batches)) {
     batches = {};
diff --git a/src/ol/replay/ibatchgroup.js b/src/ol/replay/ibatchgroup.js
index 4113086188..c0339bf2e6 100644
--- a/src/ol/replay/ibatchgroup.js
+++ b/src/ol/replay/ibatchgroup.js
@@ -64,7 +64,7 @@ ol.replay.IBatchGroup.prototype.finish = function() {
 
 
 /**
- * @param {number} zIndex Z index.
+ * @param {number|undefined} zIndex Z index.
  * @param {ol.replay.BatchType} batchType Batch type.
  * @return {ol.replay.IBatch} Batch.
  */
diff --git a/src/ol/style.js b/src/ol/style.js
index c420f84bb3..78166b1727 100644
--- a/src/ol/style.js
+++ b/src/ol/style.js
@@ -62,7 +62,7 @@ ol.style.stroke.equals = function(strokeStyle1, strokeStyle2) {
  * @typedef {{fill: ?ol.style.Fill,
  *            image: ?ol.style.Image,
  *            stroke: ?ol.style.Stroke,
- *            zIndex: number}}
+ *            zIndex: (number|undefined)}}
  */
 ol.style.Style;