[Bug 46180] wineserver does not unregister windows classes on process termination

https://bugs.winehq.org/show_bug.cgi?id=46180

--- Comment #1 from Alexandre Julliard  ---
(In reply to Ralf Habacker from comment #0)
> According to
> (https://docs.microsoft.com/en-us/windows/desktop/api/winuser/nf-winuser-
> registerclassa), Windows unregisters window classes registered by a process
> at process termination, which is not implemented in wine and leads to
> resource leaks.

It's implemented in destroy_process_classes().