Since ifa_refcnt was bumped to an int and rt_flags is an int too, bump ifa_flags to int.
Since ifa_refcnt was bumped to an int and rt_flags is an int too, bump
ifa_flags to int.

orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars