staticd: Fix src-dest route not installed

Process IPv6 src-dest routes on nht update, otherwise they are not
installed:

    (config)# ipv6 route 1::1/128 from 2::2/128 fe80::1 eth0

Signed-off-by: Xiao Liang <[email protected]>

staticd/static_nht.c

@@ -72,7 +72,7 @@ static void static_nht_update_safi(struct prefix *sp, struct prefix *nhp,
 		return;
 	}
 
-	for (rn = route_top(stable); rn; rn = route_next(rn)) {
+	for (rn = route_top(stable); rn; rn = srcdest_route_next(rn)) {
 		si = static_route_info_from_rnode(rn);
 		if (!si)
 			continue;
@@ -106,7 +106,7 @@ static void static_nht_reset_start_safi(struct prefix *nhp, afi_t afi,
 	if (!stable)
 		return;
 
-	for (rn = route_top(stable); rn; rn = route_next(rn)) {
+	for (rn = route_top(stable); rn; rn = srcdest_route_next(rn)) {
 		si = static_route_info_from_rnode(rn);
 		if (!si)
 			continue;