Use Default::default() to construct () as score-updating param

In 6b0d94a we switched most tests
to `Default::default()` for scoring parameters passed to
route-fetching. Here we do the same for the scoring parameters when
passed to score-updating.

Author: TheBlueMatt

lightning-background-processor/src/lib.rs

@@ -1181,7 +1181,7 @@ mod tests {
 			let network_graph = Arc::new(NetworkGraph::new(network, logger.clone()));
 			let scorer = Arc::new(Mutex::new(TestScorer::new()));
 			let seed = [i as u8; 32];
-			let router = Arc::new(DefaultRouter::new(network_graph.clone(), logger.clone(), seed, scorer.clone(), ()));
+			let router = Arc::new(DefaultRouter::new(network_graph.clone(), logger.clone(), seed, scorer.clone(), Default::default()));
 			let chain_source = Arc::new(test_utils::TestChainSource::new(Network::Bitcoin));
 			let kv_store = Arc::new(FilesystemStore::new(format!("{}_persister_{}", &persist_dir, i).into()));
 			let now = Duration::from_secs(genesis_block.header.time as u64);

lightning/src/util/test_utils.rs

@@ -140,10 +140,10 @@ impl<'a> Router for TestRouter<'a> {
 						// Since the path is reversed, the last element in our iteration is the first
 						// hop.
 						if idx == path.hops.len() - 1 {
-							scorer.channel_penalty_msat(hop.short_channel_id, &NodeId::from_pubkey(payer), &NodeId::from_pubkey(&hop.pubkey), usage, &());
+							scorer.channel_penalty_msat(hop.short_channel_id, &NodeId::from_pubkey(payer), &NodeId::from_pubkey(&hop.pubkey), usage, &Default::default());
 						} else {
 							let curr_hop_path_idx = path.hops.len() - 1 - idx;
-							scorer.channel_penalty_msat(hop.short_channel_id, &NodeId::from_pubkey(&path.hops[curr_hop_path_idx - 1].pubkey), &NodeId::from_pubkey(&hop.pubkey), usage, &());
+							scorer.channel_penalty_msat(hop.short_channel_id, &NodeId::from_pubkey(&path.hops[curr_hop_path_idx - 1].pubkey), &NodeId::from_pubkey(&hop.pubkey), usage, &Default::default());
 						}
 					}
 				}
@@ -153,7 +153,7 @@ impl<'a> Router for TestRouter<'a> {
 		let logger = TestLogger::new();
 		find_route(
 			payer, params, &self.network_graph, first_hops, &logger,
-			&ScorerAccountingForInFlightHtlcs::new(self.scorer.read().unwrap(), &inflight_htlcs), &(),
+			&ScorerAccountingForInFlightHtlcs::new(self.scorer.read().unwrap(), &inflight_htlcs), &Default::default(),
 			&[42; 32]
 		)
 	}