return a scaled tile

def scaled_tile(self, tile):
		'''return a scaled tile'''
		width = int(TILES_WIDTH / tile.scale)
		height = int(TILES_HEIGHT / tile.scale)
		scaled_tile = cv.CreateImage((width,height), 8, 3)
		full_tile = self.load_tile(tile)
		cv.Resize(full_tile, scaled_tile)
		return scaled_tile