message: fuzz: make FuzzedSock::Wait() sometimes simulate an occurred event
diff: @@ -18,7 +18,9 @@ bool FuzzedSock::Wait(std::chrono::milliseconds timeout, Event requested, Event*
  SetFuzzedErrNo(m_fuzzed_data_provider, wait_errnos);
  return false;
  }
  - if (occurred) *occurred = 0;
  + if (occurred != nullptr) {
  + *occurred = m_fuzzed_data_provider.ConsumeBool() ? requested : 0;
  + }
  return true;
  }
  