Sparse issues an 'Using plain integer as NULL pointer' warning when
passing the constant '0' as the second parameter in the call to the
WSAEventSelect() function. The function parameter has a pointer type
(WSAEVENT, aka HANDLE, aka void *) so that, in order to suppress the
warning, we simply pass NULL for that parameter in the function call
expression.
Signed-off-by: Ramsay Jones <ramsay@ramsay1.demon.co.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>