fix mingw build failed

[cctv130]

No description provided.

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[michael-grunder]

I know very little about MinGW, but is there a simpler strategy?

Instead of defining usleep when in Windows, could we instead just modify millisleep to be this:

static void millisleep(int ms)
{
#if defined(_WIN32)
    Sleep(ms);
#else
    usleep(ms*1000);
#endif
}

And then add an #include <windows.h> at the top of test.c after our #ifdef _WIN32?

One other tiny thing is your editor is adding windows line breaks \r\n whereas this just wants \n.

[michael-grunder]

Suggested change

	#if defined(_WIN32) && !defined(__MINGW32__)
	#if !defined(__MINGW32__)

I think we're already in an #else block of #ifndef _WIN32?

[cctv130]

I plan to abandon mingw, so I close this PR.