bgpd, zebra: support NEXTHOP_IPV4_IFINDEX in bgp import check

Signed-off-by: Christian Franke <chris@opensourcerouting.org>
Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
diff --git a/zebra/zserv.c b/zebra/zserv.c
index f792c83..1182937 100644
--- a/zebra/zserv.c
+++ b/zebra/zserv.c
@@ -627,6 +627,10 @@
 	      case ZEBRA_NEXTHOP_IPV4:
 		stream_put_in_addr (s, &nexthop->gate.ipv4);
 		break;
+	      case ZEBRA_NEXTHOP_IPV4_IFINDEX:
+		stream_put_in_addr (s, &nexthop->gate.ipv4);
+		stream_putl (s, nexthop->ifindex);
+		break;
 	      case ZEBRA_NEXTHOP_IFINDEX:
 	      case ZEBRA_NEXTHOP_IFNAME:
 		stream_putl (s, nexthop->ifindex);