core,w32: Silence compiler warnings.
core,w32: Silence compiler warnings.

* src/w32-util.c (_gpgme_w32_cancel_synchronous_io): Add some casts.
--

Signed-off-by: Werner Koch <13bd1fc5137f503b0a8355ad400e7a87ebb45b25@gnupg.org>

gpg/gpgme,gpg/gpgme,gpg/gpgme,gpg/gpgme,gpg/gpgme,gpg/gpgme,gpg/gpgme