rem: int ret;
add: unsigned int ret;
context: parse_tcp_option(const char *option, u_int8_t *result){	int ret;	ret = string_to_number(option, 1, 255);	if (ret == -1)		exit_error(PARAMETER_PROBLEM, "Bad TCP option `%s'", option);	*result = (u_int8_t)ret;}