rem: if (check_inverse(optarg, &invert)) optind++;
add: check_inverse(optarg, &invert, &optind, 0);
context: parse(int c, char **argv, int invert, unsigned int *flags,      const struct ipt_entry *entry,      unsigned int *nfcache,      struct ipt_entry_match **match){	struct ipt_icmp *icmpinfo = (struct ipt_icmp *)(*match)->data;	switch (c) {	case '1':		if (check_inverse(optarg, &invert))			optind++;		*nfcache |= parse_icmp(argv[optind-1],				       &icmpinfo->type,				       icmpinfo->code);		if (invert)			icmpinfo->invflags |= IPT_ICMP_INV;		break;	default:		return 0;	}	return 1;}