* isis_spf.c: Changing cost from uint16_t to uint32_t. Unset
	  ISIS_ROUTE_FLAG_ACTIVE flag before running SPF.
	* isisd.[ch]: Separate route tables for different levels. SPF is done
	  separately, but in case of L1L2 area they have to be merged.
	* isis_zebra.c: Set/unset ISIS_ROUTE_FLAG_ZEBRA_SYNC flag correctly in
	  case of adding/removing IPv4 routes.
	* zebra_route.c: Rework route validating process. Merging L1 and L2
	  tables in case of L1L2 area.

        In short - many changes to make SPF work more correctly, add/remove
        to/from RIB also works now. It's still very far from perfect though.
diff --git a/isisd/isis_route.h b/isisd/isis_route.h
index 59b6c22..4eac79b 100644
--- a/isisd/isis_route.h
+++ b/isisd/isis_route.h
@@ -57,7 +57,7 @@
 struct isis_route_info *isis_route_create (struct prefix *prefix,
 					   u_int32_t cost, u_int32_t depth,
 					   struct list *adjacencies,
-					   struct isis_area *area);
+					   struct isis_area *area, int level);
 
 int isis_route_validate (struct thread *thread);