minor style change

src/sys/windows/named_pipe.rs

@@ -942,16 +942,18 @@ fn event_done(status: &OVERLAPPED_ENTRY, events: Option<&mut Vec<Event>>) {
     let io = me.io.lock().unwrap();
 
     // Make sure the I/O handle is still registered with the selector
-    //
-    // This method is also called during `Selector::drop` to perform cleanup. In
-    // this case, `events` is `None` and we don't need to track the event.
-    if io.token.is_some() && events.is_some() {
-        let mut ev = Event::from_completion_status(&status);
-        // Reverse the `.data` alteration done in `schedule_event`. This
-        // alteration was done so the selector recognized the event as one from
-        // a named pipe.
-        ev.data >>= 1;
-        events.expect("events must be some").push(ev);
+    if io.token.is_some() {
+        // This method is also called during `Selector::drop` to perform
+        // cleanup. In this case, `events` is `None` and we don't need to track
+        // the event.
+        if let Some(events) = events {
+            let mut ev = Event::from_completion_status(&status);
+            // Reverse the `.data` alteration done in `schedule_event`. This
+            // alteration was done so the selector recognized the event as one from
+            // a named pipe.
+            ev.data >>= 1;
+            events.push(ev);
+        }
     }
 }