mmdevapi: Prevent 64 bit overflow within a few days of audio device use. (try 3)

[Joerg-Cyril.Hoehle at t-systems.com]

Hi,

This is almost a resend of v2, because it almost
hit the bottom of source.winehq.org/patches/

What happened?

The only comments about v2 were Michael Stefaniuc
suggesting a refactoring and me explaining why
in this particular case, that would not be a good idea.
http://www.winehq.org/pipermail/wine-devel/2013-March/099068.html

For v3, I've renamed MulDiv64 to UMulDiv64. Unlike QueryPerformanceCounter,
mmdevapi GetPosition operates on unsigned values.

The idea to replace X * numerator / denominator by
X / den * mul + remainder from euclidian division came from
http://blog.airsource.co.uk/index.php/2010/03/15/quelle-heure-est-il/

Regards,
	Jörg Höhle
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