#85 patch to improve "find_platform_sdk_dir" in setup.py

[Trent Mick]

The latest Platform SDK (the "Microsoft Windows Vista SDK") changes the directory and registry keys that identify where it is installed. This updates the method that finds that in "setup.py" to find it.

[Trent Mick]

update to setup.py to find Windows Vista SDK

[Mark Hammond]

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Thanks Trent - please check it in!

[Trent Mick]

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I hadn't noticed the addition of "# 4. Vista's SDK" in an earlier change to setup.py. I guess that match this patch a change to *prefer* using that SDK if it is installed as well as older ones in the older "C:\Program Files\Microsoft Platform SDK" or "C:\Program Files\Microsoft SDK"

[Mark Hammond]

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The order is largely arbitrary so I'm happy for you to just go for it if you are confident it works.

[Mark Hammond]

I think Trent did check this in.