Handle case where v6stat.zero_pos == 0 correctly.
Handle case where v6stat.zero_pos == 0 correctly.

Reported by: Kurt Roeckx <kurt@roeckx.be>, Tobias Ginzler <ginzler@fgan.de> (Debian bug #506111)

openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl