message: fix markers parse in gen_pattern.py
diff: @@ -171,7 +171,7 @@ def main():
  parser.add_argument("-m", "--markers", help="list of cells with markers for the radon checkerboard. Marker "
  "coordinates as list of numbers: -m 1 2 3 4 means markers in cells "
  "[1, 2] and [3, 4]",
  - action="store", dest="markers", nargs="+", type=int)
  + default=argparse.SUPPRESS, action="store", dest="markers", nargs="+", type=int)
  args = parser.parse_args()
  show_help = args.show_help
  @@ -195,6 +195,8 @@ def main():
  "A5": [148, 210]}
  page_width = page_sizes[page_size][0]
  page_height = page_sizes[page_size][1]
  + markers = None
  + if p_type == "radon_checkerboard" and "markers" in args:
  if len(args.markers) % 2 == 1:
  raise ValueError("The length of the markers array={} must be even".format(len(args.markers)))
  markers = set()
  