bgpd: improve cleanup in bgp_delete()

Signed-off-by: Lou Berger <lberger@labn.net>
diff --git a/bgpd/bgp_zebra.h b/bgpd/bgp_zebra.h
index 50f727d..ff9b375 100644
--- a/bgpd/bgp_zebra.h
+++ b/bgpd/bgp_zebra.h
@@ -26,6 +26,7 @@
 extern struct stream *bgp_nexthop_buf;
 
 extern void bgp_zebra_init (struct thread_master *master);
+extern void bgp_zebra_destroy (void);
 extern int bgp_if_update_all (void);
 extern int bgp_config_write_maxpaths (struct vty *, struct bgp *, afi_t,
 				      safi_t, int *);