Re: [PATCH v2 0/1] MR18: include: Use __MINGW_PRINTF_FORMAT when compiling with MinGW.

[Henri Verbeet (＠hverbeet)]

Unfortunately, this doesn't appear to play very nice with the `-D__USE_MINGW_ANSI_STDIO=0` we pass for `make crosstest`. For example:

```
  CCLD     tests/d3d12.cross32.exe
In file included from <vkd3d>/tests/d3d12_crosstest.h:46,
                 from <vkd3d>/tests/d3d12.c:24:
<vkd3d>/tests/d3d12.c: In function ‘check_heap_desc_’:
<vkd3d>/tests/d3d12.c:124:13: warning: format ‘%u’ expects argument of type ‘unsigned int’, but argument 4 has type ‘UINT64’ {aka ‘const long long unsigned int’} [-Wformat=]
             "Got size %"PRIu64", expected %"PRIu64".\n",
             ^~~~~~~~~~~~
             desc->SizeInBytes, expected.SizeInBytes);
             ~~~~~~~~~~~~~~~~~
<vkd3d>/include/private/vkd3d_test.h:68:35: note: in definition of macro ‘VKD3D_TEST_OK’
         vkd3d_test_ok(vkd3d_line, __VA_ARGS__); } while (0)
                                   ^~~~~~~~~~~
<vkd3d>/tests/d3d12.c:123:5: note: in expansion of macro ‘ok_’
     ok_(line)(desc->SizeInBytes == expected.SizeInBytes,
     ^~~
In file included from <vkd3d>/include/private/vkd3d_test.h:24,
                 from <vkd3d>/tests/d3d12_crosstest.h:46,
                 from <vkd3d>/tests/d3d12.c:24:
/usr/share/mingw-w64/include/inttypes.h:94:20: note: format string is defined here
 #define PRIu64 "I64u"
```