[PATCH v5 0/3] MR3105: Add a few additional nullchecks (Coverity)

[Fabian Maurer (＠DarkShadow44)]

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  v5: mmdevapi: Add nullcheck for parameter that can be null (Coverity)
      winealsa: Remove superflous check
      wineoss: Remove superflous check
 
https://gitlab.winehq.org/wine/wine/-/merge_requests/3105