check_for_opt_number_arg(typval_T *args, int idx)
{
    return (args[idx].v_type == VAR_UNKNOWN
	    || check_for_number_arg(args, idx) != FAIL);
}
check_for_opt_number_arg(typval_T *args, int idx)
{
    return (args[idx].v_type == VAR_UNKNOWN
	    || check_for_number_arg(args, idx) != FAIL);
}