wined3d: Use a separate mutex for wndproc_table access.

[Henri Verbeet]

On 18 June 2011 12:51, Stefan Dösinger <stefandoesinger at gmx.at> wrote:
> You don't need wined3d_wndproc_mutex_(un)lock. Just use EnterCriticalSection /
> LeaveCriticalSection directly. wined3d_mutex_lock exists because it is
> exported from wined3d.
>
I don't know, I think there's something to say for having those functions.