zebra: Fix incorrectly flagged nexthop

A valid BGP nexthop is sometimes flagged as invalid, this patch
fixes that issue.

Signed-off-by: Daniel Walton <dwalton@cumulusnetworks.com>
Edited-by: Paul Jakma <paul.jakma@hpe.com>, also add the check for
NEXTHOP_FLAG_ACTIVE which was added in a separate, route-map related commit
(6baeed5 lib, zebra: Add route-map support for Next Hop Tracking)
1 file changed