fix for #549 - clearing out of map div on map.destroy(). this fixes many opera tests

git-svn-id: http://svn.openlayers.org/trunk/openlayers@2836 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

tests/test_Map.html

@@ -318,11 +318,12 @@
 
     
     function test_99_Map_destroy (t) {
-        t.plan( 2 );    
+        t.plan( 3 );    
         map = new OpenLayers.Map('map');
         map.destroy();
         t.eq( map.layers, null, "map.layers is null after destroy" );
         t.eq( map.controls, null, "map.controls is null after destroy" );
+        t.eq( map.div.innerHTML, "", "map's div cleared out");
     }
   // -->
   </script>