comment about pointer relase in sending state

Figured out, why it sometimes happened that the pointer is released in
sending state. However nothing we can do about it.

(not a real issue)

src/backend/producer/wayland.rs

@@ -712,6 +712,13 @@ impl Dispatch<wl_pointer::WlPointer, ()> for State {
                 app.pending_events.push_back((*client, Event::Enter()));
             }
             wl_pointer::Event::Leave { .. } => {
+                /* There are rare cases, where when a window is opened in
+                 * just the wrong moment, the pointer is released, while
+                 * still grabbed.
+                 * In that case, the pointer must be ungrabbed, otherwise
+                 * it is impossible to grab it again (since the pointer
+                 * lock, relative pointer,... objects are still in place)
+                 */
                 app.ungrab();
             }
             wl_pointer::Event::Button {

src/server.rs

@@ -131,7 +131,6 @@ impl Server {
                 tokio::select! {
                     event = producer.next() => {
                         let event = event.ok_or(anyhow!("event producer closed"))??;
-                        log::debug!("producer event: {event:?}");
                         server.handle_producer_event(&mut producer, &sender_ch, &timer_ch, event).await?;
                     }
                     e = producer_notify_rx.recv() => {