mopidy --list-settings fails on fresh install

[grunskis]

Stack trace:

Traceback (most recent call last):
  File /usr/lib/python2.6/runpy.py, line 122, in _run_module_as_main
    __main__, fname, loader, pkg_name)
  File /usr/lib/python2.6/runpy.py, line 34, in _run_code
    exec code in run_globals
  File /home/martins/source/tmp/mopidy/mopidy/__main__.py, line 17, in <module>
    main()
  File /home/martins/source/tmp/mopidy/mopidy/__main__.py, line 14, in main
    CoreProcess().run()
  File /home/martins/source/tmp/mopidy/mopidy/core.py, line 20, in __init__
    self.options = self.parse_options()
  File /home/martins/source/tmp/mopidy/mopidy/core.py, line 40, in parse_options
    return parser.parse_args()[0]
  File /usr/lib/python2.6/optparse.py, line 1394, in parse_args
    stop = self._process_args(largs, rargs, values)
  File /usr/lib/python2.6/optparse.py, line 1434, in _process_args
    self._process_long_opt(rargs, values)
  File /usr/lib/python2.6/optparse.py, line 1509, in _process_long_opt
    option.process(opt, value, values, self)
  File /usr/lib/python2.6/optparse.py, line 788, in process
    self.action, self.dest, opt, value, values, parser)
  File /usr/lib/python2.6/optparse.py, line 808, in take_action
    self.callback(self, opt, value, parser, *args, **kwargs)
  File /home/martins/source/tmp/mopidy/mopidy/utils/settings.py, line 144, in list_settings_optparse_callback
    if key.endswith('PASSWORD') and len(value):
TypeError: object of type 'NoneType' has no len()

[grunskis]

btw I have this fixed in my fork grunskis@f33c65d

[jodal]

Thanks for the bug report and the patch! :-)

I've applied your patch to the develop branch and did a followup commit, e150a24, with some changes. See the commit message for an explanation of my changes.