am 1aca962a: allow for malformed imagesizes.txt

  OPTIONS.max_image_size = {}

  try:

    for line in open(os.path.join(OPTIONS.input_tmp, "META", "imagesizes.txt")):

      image, size = line.split()

      size = int(size)

      pieces = line.split()

      if len(pieces) != 2: continue

      image = pieces[0]

      size = int(pieces[1])

      OPTIONS.max_image_size[image + ".img"] = size

  except IOError, e:

    if e.errno == errno.ENOENT: