bug report: hg addremove -s -n

[Bas van Oostveen]

# hg addremove -s -n
** unknown exception encountered, details follow
** report bug details to http://www.selenic.com/mercurial/bts
** or mercurial at selenic.com
** Mercurial Distributed SCM (version 0.9.4)
Traceback (most recent call last):
  File "/usr/bin/hg", line 11, in ?
    mercurial.commands.run()
  File "/var/lib/python-support/python2.4/mercurial/commands.py", line
3110, in run
    sys.exit(dispatch(sys.argv[1:], argv0=sys.argv[0]))
  File "/var/lib/python-support/python2.4/mercurial/commands.py", line
3107, in dispatch
    return cmdutil.runcatch(u, args, argv0=argv0)
  File "/var/lib/python-support/python2.4/mercurial/cmdutil.py", line
37, in runcatch
    return dispatch(ui, args, argv0=argv0)
  File "/var/lib/python-support/python2.4/mercurial/cmdutil.py", line
364, in dispatch
    ret = runcommand(ui, options, cmd, d)
  File "/var/lib/python-support/python2.4/mercurial/cmdutil.py", line
417, in runcommand
    return checkargs()
  File "/var/lib/python-support/python2.4/mercurial/cmdutil.py", line
373, in checkargs
    return cmdfunc()
  File "/var/lib/python-support/python2.4/mercurial/cmdutil.py", line
356, in <lambda>
    d = lambda: func(ui, repo, *args, **cmdoptions)
  File "/var/lib/python-support/python2.4/mercurial/commands.py", line
56, in addremove
    sim = float(opts.get('similarity') or 0)
ValueError: invalid literal for float(): -n