zebra: fix IPv6 RA wrt interface removal (BZ#480)
diff --git a/zebra/rtadv.c b/zebra/rtadv.c
index 8cc3c4c..3e8750a 100644
--- a/zebra/rtadv.c
+++ b/zebra/rtadv.c
@@ -368,7 +368,7 @@
 
   for (ALL_LIST_ELEMENTS (iflist, node, nnode, ifp))
     {
-      if (if_is_loopback (ifp))
+      if (if_is_loopback (ifp) || ! if_is_operative (ifp))
 	continue;
 
       zif = ifp->info;