Re: [PATCH v2 0/1] MR3854: winmm: Avoid use of hardcoded return values.

[Huw Davies (＠huw)]

> Since MCI_UnmapMsgAtoW handles all the cases where MCI_MapMsgAtoW allocates memory. Why not just call MCI_UnmapMsgAtoW to do its thing in all cases?

Fine, but it would need to be a separate commit to that of changing the return values of `MCI_MapMsgAtoW()`.

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https://gitlab.winehq.org/wine/wine/-/merge_requests/3854#note_47829