Code review comment for lp:~jelmer/bzr-pqm/2.5-compat

Meh, I've re-read the original code:

   config = StackedConfig()
    if branch:
        config.add_source(branch.get_config())
    else:
        if public_location:
            config.add_source(_mod_config.LocationConfig(public_location))
        config.add_source(_mod_config.GlobalConfig())

So that's indeed what my fix does, either there is a branch and the usual location/branch/global is in effect or there is a location and it's location/global or there is only global.