2006-02-15 Marcus Brinkmann <marcus@g10code.de>

• w32-io.c (create_writer): Make C->have_data a manually resetted

event.
(writer): Move code from end of if block to beginning, so it
is also run the first time.
(_gpgme_io_write): Move assert check after error check. Reset
the is_empty event, and also do it eagerly.
(_gpgme_io_select): Unconditionally wait for the is_empty event.