f chanmon skip mut

Author: TheBlueMatt

lightning/src/chain/channelmonitor.rs

@@ -2735,10 +2735,11 @@ impl<'a, Signer: Sign, K: KeysInterface<Signer = Signer>> ReadableArgs<&'a K>
 		let mut secp_ctx = Secp256k1::new();
 		secp_ctx.seeded_randomize(&keys_manager.get_secure_random_bytes());
 
-		let mut last_seen_block_hash = Some(last_block_hash.clone());
-		if last_block_hash == Default::default() {
-			last_seen_block_hash = None;
-		}
+		let last_seen_block_hash = if last_block_hash == Default::default() {
+			None
+		} else {
+			Some(last_block_hash)
+		};
 
 		Ok((last_seen_block_hash, ChannelMonitor {
 			inner: Mutex::new(ChannelMonitorImpl {