Revert "Merge pull request #116 from elemoine/redraw"

This reverts commit 7a5b469192, reversing
changes made to a719de7e93.

Conflicts:

	tests/Tile/Image.html

tests/Layer/HTTPRequest.html

@@ -68,7 +68,7 @@
     }
 
     function test_Layer_HTTPRequest_mergeNewParams (t) {
-        t.plan( 9 );
+        t.plan( 8 );
 
         var map = new OpenLayers.Map('map');
         layer = new OpenLayers.Layer.HTTPRequest(name, url, params, options);
@@ -100,9 +100,7 @@
         
         layer.redraw = function() {
             t.ok(true, "layer.mergeNewParams calls layer.redraw");
-            t.ok(layer.resolution === null, "layer.mergeNewParams sets resolution to null");
-        };
-        layer.resolution = 'fake';
+        }
         layer.mergeNewParams();
     }