nft-compat: fix wrong protocol context in initialization

This fixes matches/targets that are dependent on that IPv4/Ipv6
context, eg.

 # ip6tables-compat -I INPUT -j REJECT --reject-with icmp6-addr-unreachable
 # ip6tables-compat-save
 ...
 -A INPUT -j REJECT --reject-with icmp6-port-unreachable

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2 files changed