From 905bd6d441edd982bbaabbef2f9b5c685a17f049 Mon Sep 17 00:00:00 2001
From: Schuyler Erle <schuyler@nocat.net>
Date: Fri, 8 Jun 2007 18:31:28 +0000
Subject: [PATCH] Fix #745, including test.

git-svn-id: http://svn.openlayers.org/trunk/openlayers@3299 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
---
 lib/OpenLayers/Layer/Image.js |  6 ++++--
 tests/Layer/test_Image.html   | 10 ++++++++++
 2 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/lib/OpenLayers/Layer/Image.js b/lib/OpenLayers/Layer/Image.js
index 861d2c86b1..cdf37aa0ef 100644
--- a/lib/OpenLayers/Layer/Image.js
+++ b/lib/OpenLayers/Layer/Image.js
@@ -68,8 +68,10 @@ OpenLayers.Layer.Image.prototype =
      * 
      */
     destroy: function() {
-        this.tile.destroy();
-        this.tile = null;
+        if (this.tile) {
+            this.tile.destroy();
+            this.tile = null;
+        }
         OpenLayers.Layer.prototype.destroy.apply(this, arguments);
     },
     
diff --git a/tests/Layer/test_Image.html b/tests/Layer/test_Image.html
index 8763261f42..a1b38a0985 100644
--- a/tests/Layer/test_Image.html
+++ b/tests/Layer/test_Image.html
@@ -77,6 +77,16 @@
  */
 
 
+    function test_99_Layer_Image_destroy_before_use (t) {
+        t.plan(1);
+        var map = new OpenLayers.Map('map');
+        layer = new OpenLayers.Layer.Image('Test', 'http://earthtrends.wri.org/images/maps/4_m_citylights_lg.gif', new OpenLayers.Bounds(-180, -88.759, 180, 88.759), new OpenLayers.Size(580, 288));
+        map.addLayer(layer);
+        map.removeLayer(layer);
+        layer.destroy();
+        t.ok(true, "destroy() didn't throw an error");
+    }
+
     function test_99_Layer_Image_destroy (t) {
         t.plan( 4 );