fl2k file does not accept "-" as filename to read from stdin

$ fl2k_file fl2k_file, a sample player for FL2K VGA dongles Usage: [-d device_index (default: 0)] [-r repeat file (default: 1)] [-s samplerate (default: 100 MS/s)] filename (use '-' to read from stdin) $ fl2k_file -s 8192000 - Failed to open - I'm perfectly willing to pitch in and fix this. How do you prefer to receive contributions?