Bug in ait seq upload

if id is not specified, it defaults to None, but then later tries to create and int(None) and breaks the code.

By switching id=0 as default, this allows us to proceed and eventually extract the seqID from the encoded bin file

If this is intentional such that ID is always provided as an argument then it should be in the arg parser.

def init (self, pathname=None, cmddict=None, id=None, version=0):
"""Creates a new AIT Command Sequence

Creates an empty sequence which will be encoded and decoded based
on the given command dictionary (default: cmd.DefaultCmdDict).  If
the optional pathname is given, the command sequence (text or
binary) will be read from it.
"""
self.pathname  = pathname
self.cmddict   = cmddict or cmd.getDefaultCmdDict()
self.crc32     = None
self.seqid     = int(id)

Start at the AIT Command Sequence init shown in the issue and trace the upload path that reaches int(id). Check whether id is expected from the argument parser; done means uploads without an id no longer fail and the seqID can be extracted from the encoded binary file.