[PATCH 0/2] MR7417: mfplat: Modify MFCreateWaveFormatExFromMFMediaType to allow MF_MT_AM_FORMAT_TYPE to be missing or set to GUID_NULL.

[Brendan McGrath (＠redmcg)]

This MR:
- adds tests for when MF_MT_AM_FORMAT_TYPE is missing or set to GUID_NULL; and
- modifies MFCreateWaveFormatExFromMFMediaType to pass these tests

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https://gitlab.winehq.org/wine/wine/-/merge_requests/7417