Fix possible crash in server-decoration when surface destroyed

If the underlying surface is destroyed, but the client has not yet
destroyed the server decoration object, and then tries to call
request_mode() on it, the compositor will crash, because the
wlr_server_decoration struct has been freed, and the wl_resource's
user_data member has been NULLed out.

Yes, this is certainly an error for the client to do that, but I
shouldn't be able to write a buggy (or malicious) Wayland app that can
take down the entire compositor.

0 files changed, 0 insertions, 0 deletions