wayland: ignore events for dead objects

Nothing wrong will happen if we ignore events when compositor is at
wrong, at least crashing because compositor is just _wrong_ probably is
not a great option.

Links: https://github.com/alacritty/alacritty/issues/8065

src/changelog/unreleased.md

@@ -76,3 +76,7 @@ changelog entry.
 
   This feature was incomplete, and the equivalent functionality can be trivially achieved outside
   of `winit` using `objc2-ui-kit` and calling `UIDevice::currentDevice().userInterfaceIdiom()`.
+
+### Fixed
+
+- On Wayland, avoid crashing when compositor is misbehaving.