fix clippy

src/capture.rs

@@ -136,7 +136,7 @@ async fn do_capture(
 }
 
 thread_local! {
-    static PREV_LOG: Cell<Option<Instant>> = Cell::new(None);
+    static PREV_LOG: Cell<Option<Instant>> = const { Cell::new(None) };
 }
 
 /// debounce a statement `$st`, i.e. the statement is executed only if the

src/listen.rs

@@ -119,7 +119,7 @@ async fn read_loop(
 ) -> Result<(), Error> {
     let mut b = [0u8; MAX_EVENT_SIZE];
 
-    while let Ok(_) = conn.recv(&mut b).await {
+    while conn.recv(&mut b).await.is_ok() {
         match b.try_into() {
             Ok(event) => dtls_tx
                 .send((event, conn.remote_addr().expect("no remote addr")))