Appease clippy comparison-chain on f4 length

Author: Gemini Agent

actors/ethaccount/src/lib.rs

@@ -211,12 +211,14 @@ impl EthAccountActor {
             Payload::Delegated(d) if d.namespace() == EAM_ACTOR_ID => {
                 let daddr = d.subaddress();
                 let mut eth_addr = [0u8; 20];
-                if daddr.len() == 20 {
-                    eth_addr.copy_from_slice(daddr);
-                } else if daddr.len() > 20 {
-                    eth_addr.copy_from_slice(&daddr[daddr.len() - 20..]);
-                } else {
-                    return Err(ActorError::illegal_state("EthAccount has non-20B f4".into()));
+                match daddr.len().cmp(&20) {
+                    std::cmp::Ordering::Equal => eth_addr.copy_from_slice(daddr),
+                    std::cmp::Ordering::Greater => {
+                        eth_addr.copy_from_slice(&daddr[daddr.len() - 20..])
+                    }
+                    std::cmp::Ordering::Less => {
+                        return Err(ActorError::illegal_state("EthAccount has non-20B f4".into()));
+                    }
                 }
                 eth_addr
             }