tun2socks: fix possible crash due to the use of a wrong dead-variable
tun2socks: fix possible crash due to the use of a wrong dead-variable

SeReRPRo/badvpn,SeReRPRo/badvpn,SeReRPRo/badvpn,SeReRPRo/badvpn,SeReRPRo/badvpn