Fix call without any argument doesn't display usage

                        "cache: list packages in cache. "

                        "modes: list comparaison modes. ")

    p_list.set_defaults(func=command_list)

    return p_main.parse_args()

    namespace = p_main.parse_args()

    # Ensure subparser was choosen

    if "func" not in namespace:

        p_main.error("missing argument")

    return namespace

def command_check(args, vctrl):

    '''Handle check command call'''