RFC: winedev guide multimedia chapter patch

[Frédéric Delanoy]

Hi guys,

I've been updating the wine multimedia paths of the wine dev guide,
but I'm not really familiar with that area of Wine, so could you
please have a look at the attached patch to check if it seems correct?
I checked the code a bit but I'm not sure how outdated the guide is.

For easier "testing", just clone
http://source.winehq.org/git/docs.git, apply the patch and run
./configure, then 'make winedev-guide.html' in the "en/" subdirectory.

Thanks,

Frédéric Delanoy