size which is not the same size as all the tiles on the layer (as is the case in Zoomify layers), change Tile.Image to use the size passed in on construction instead of this.layer.tileSize. All tests still pass, should have no functional change for all existing layers. patch by pascalou, r=me (Closes #1496) git-svn-id: http://svn.openlayers.org/trunk/openlayers@9115 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf