message: use named default values for loggin streams
diff: @@ -182,12 +182,12 @@ namespace ospray {
  struct StatusMsgStream : public std::stringstream
  {
  - StatusMsgStream(uint32_t postAtLogLevel = 0);
  + StatusMsgStream(uint32_t postAtLogLevel = OSP_LOG_DEBUG);
  StatusMsgStream(StatusMsgStream &&other);
  ~StatusMsgStream();
  private:
  - uint32_t logLevel{0};
  + uint32_t logLevel{OSP_LOG_DEBUG};
  };
  inline StatusMsgStream::StatusMsgStream(uint32_t postAtLogLevel)
  @@ -208,7 +208,7 @@ namespace ospray {
  }
  OSPRAY_CORE_INTERFACE StatusMsgStream
  - postStatusMsg(uint32_t postAtLogLevel = 0);
  + postStatusMsg(uint32_t postAtLogLevel = OSP_LOG_DEBUG);
  /////////////////////////////////////////////////////////////////////////////
  