Merge pull request #840 from bartvde/clone

when cloning a layer that is loading, make sure numLoadingTiles is reset...

lib/OpenLayers/Layer/Grid.js

@@ -428,6 +428,7 @@ OpenLayers.Layer.Grid = OpenLayers.Class(OpenLayers.Layer.HTTPRequest, {
         obj.backBuffer = null;
         obj.backBufferTimerId = null;
         obj.loading = false;
+        obj.numLoadingTiles = 0;
 
         return obj;
     },    

tests/Layer/Grid.html

@@ -390,7 +390,7 @@
      */
 
     function test_Layer_Grid_clone(t) {
-        t.plan(6);
+        t.plan(7);
         
         var options = {tileSize: new OpenLayers.Size(500,50)};
         var map = new OpenLayers.Map('map', options);
@@ -400,8 +400,10 @@
         layer.grid = [ [6, 7], 
                        [8, 9]];
 
+        // if we clone when tiles are still loading, this should not influence the clone
+        layer.numLoadingTiles = 1;
         var clone = layer.clone();
-
+        t.eq( clone.numLoadingTiles, 0, "numLoadingTiles should be reset");
         t.ok( clone.grid != layer.grid, "clone does not copy grid");
         t.ok( clone.grid.length == 0, "clone creates a new array instead");