If another thread creates and accesses a file between the dup_handle request and
the call to remove_fd_from_cache(), the file may be allocated to the same handle
number, and that thread will then receive the wrong unix fd. Avoid this race by
invalidating the cache first.
Signed-off-by: Zebediah Figura <z.figura12@gmail.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>