server: instantiate the chanSeries struct in the gossiper's config

server.go

@@ -390,6 +390,7 @@ func newServer(listenAddrs []string, chanDB *channeldb.DB, cc *chainControl,
 		Notifier:         s.cc.chainNotifier,
 		ChainHash:        *activeNetParams.GenesisHash,
 		Broadcast:        s.BroadcastMessage,
+		ChanSeries:       &chanSeries{s.chanDB.ChannelGraph()},
 		SendToPeer:       s.SendToPeer,
 		NotifyWhenOnline: s.NotifyWhenOnline,
 		ProofMatureDelta: 0,