Re: [PATCH v21 0/1] MR5752: msvcrt: [PR53960] Fix ucrt has different struct layout than msvcrt

[Piotr Caban (＠piotr)]

Piotr Caban (@piotr) commented about dlls/msvcrt/tests/file.c:
> -
> offsetof(FILE, _cnt)==offsetof(struct test_iobuf, _cnt), "FILE layout incorrect");
>
> +#ifdef _UCRT
> - ok(stdout!=stdin+1, "ucrt stdout FILE must not be adject to stdin");
> - ok(_IOBUFFER_CRT == 0x0040 && _IOBUFFER_CRT == _IOMYBUF, "UCRT _IOBUFFER_CRT should be 0x0040");
>
> +#else
> - ok(stdout==stdin+1, "msvcrt stdout FILE must be adject to stdin");
> - ok(_IOMYBUF == 0x0008, "MSVCRT _IOBUFFER_CRT should be 0x0008");
>
> +#endif
> -
> - tempf = _tempnam(".","wne");
> - file = fopen(tempf, "wb");
> -
> - fprintf(file, "%s", "Hello World\n");
> - ptrold = file->_ptr;
> - cntold = file->_cnt;
> - if (ptrold && cntold)

Why is this `if` check needed?