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

[Huw Davies (＠huw)]

> What about If I changed the commit message to winmm: MCI_MapMsgAtoW return error code directly instead of a boolean.

That's my point: it doesn't currently return a boolean, it returns a tri-state.  One of those values tells the caller to skip calling `MCI_UnmapMsgAtoW()`.  Your change gets rid of this.