Fix closing an XWayland window doing nothing on both backends

Platform::close only ever called w.toplevel(), which is None for an
XWayland window - closing one (the WM's own close binding, or `srd
dispatch close`) silently did nothing at all, on both udev and winit.
Found live: a leftover untitled fullscreen window wouldn't close via
srd dispatch close even after several seconds, tracing back to this.

Fixed by falling back to X11Surface::close() when there's no xdg
toplevel - it already handles both cases smithay-side (a polite
WM_DELETE_WINDOW for a cooperating client, outright destroy_window for
one that doesn't support it), so no new logic was needed, just calling
it.

0 files changed, 0 insertions, 0 deletions