libweston-desktop: destroy wl_shell_surface after the wl_surface is destroyed

The wl_shell_surface spec says that it is destroyed automatically by the
server when the wl_surface is destroyed, and indeed it does not have a
destroy request. So, do that.

Signed-off-by: Giulio Camuffo <giuliocamuffo@gmail.com>
Reviewed-by: Quentin Glidic <sardemff7+git@sardemff7.net>
1 file changed