Work on interface which was not specified

[TommyWhite]

./Responder.py -I eth1 -fwrdF
eth0 192.168.1.0/24
eth1 192.168.163.0/24

But instead of eth1, eth0 was engaged, but it should not.
As you will see below, Responder poisoned subnet which did not suppose to do.
Please, correct me if I am wrong. Also I may contibute this issue, If you will help me in issue localization.

[TommyWhite]

Issue replaced to initial maintainer.