[PATCH v4 0/7] MR3328: sapi: Partially implement ISpVoice::Speak.

[Shaun Ren (＠shaunren)]

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  v4: sapi: Introduce ISpTTSEngineSite stub.
      sapi: Implement synchronous ISpVoice::Speak.
      sapi: Partially implement ISpVoice::Speak SPF_ASYNC.
      sapi: Implement ISpVoice::Speak SPF_PURGEBEFORESPEAK.
      sapi: Reset empty event after queuing a task in async_queue_task.
      sapi: Handle queue not initialized in async_empty_queue.

https://gitlab.winehq.org/wine/wine/-/merge_requests/3328