winedos: Improve PIT emulation.

[Florian Tobias Schandinat]

Alexandre Julliard schrieb:
> Florian Tobias Schandinat <FlorianSchandinat at gmx.de> writes:
> 
>> +    /* Convert: time counter -> PIT counter
>> +     * GetSystemTimeAsFileTime:    10000000 Hz
>> +     * PIT frequency:               1193182 Hz */
>> +    val = (DWORD)(val - delta*1193182./10000000.) % (maxval + 1);
> 
> You should probably use QueryPerformanceCounter as it already uses the
> correct frequency.

Thanks, will change it and resend the patch with some minor changes.