dbghelp: cross-compile

[Kevin Koltzau]

I decided to try cross compiling all of wine using mingw..hit a couple problems in dbghelp
This fixes a few of them, it still doesn't compile (primarily because of a missing regex.h at the moment)
but it does get farther

I'm not sure if these fixes are quite right..I don't fully understand this code

Changelog
	Fix a few compile errors when cross compiling
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