Kill off some warnings-problematic debug statements in ndp.c; the code

is non-functional anyway.

src/net/ndp.c

 		memset ( ndp->ll_addr, 0, netdev->ll_protocol->ll_addr_len );
 	}
 	ndp->state = state;
-	DBG ( "New neighbour cache entry (%d): IP6 %s => %s %s\n",
-	      ( ndp - ndp_table ),
+	DBG ( "New neighbour cache entry: IP6 %s => %s %s\n",
 	      inet6_ntoa ( ndp->in6 ), netdev->ll_protocol->name,
 	      netdev->ll_protocol->ntoa ( ndp->ll_addr ) );
 }
 
 	/* Check if the entry was already created */
 	if ( ndp ) {
-		DBG ( "Awaiting neighbour advertisement (cache entry %d)\n",
-		      ( ndp - ndp_table ) );
+		DBG ( "Awaiting neighbour advertisement\n" );
 		/* For test */
 //		ndp->state = NDP_STATE_REACHABLE;
 //		memcpy ( ndp->ll_addr, netdev->ll_addr, 6 );