Windows build fails because of multi-line macro expansion

[kitattyor]

I had to upgrade the solution to use Visual Studio 2019 and Windows SDK version 10.xx

These lines in input.c don't compile

static size_t inbuf_get_alloc_size (const struct inbuf *inbuf,
                                    size_t min_size) {
    ...

        return MAX(min_size,
#ifdef MREMAP_MAYMOVE
                   4096
#else
                   1024
#endif
                );

Had to change to the "naive" way to get it to compile

#ifdef MREMAP_MAYMOVE
	return MAX(min_size,
		4096
	);
#else
	return MAX(min_size,
		1024
	);
#endif