message: Fix build with actor profiler disabled
diff: @@ -102,10 +102,10 @@ public:
  # define CAF_BEFORE_SENDING_SCHEDULED(self, timeout, msg) \
  self->system().profiler_before_sending_scheduled(*self, timeout, msg)
  #else
  -# define CAF_BEFORE_PROCESSING(self, msg) CAF_VOID_STMT
  -# define CAF_AFTER_PROCESSING(self, result) CAF_VOID_STMT
  -# define CAF_BEFORE_SENDING(self, msg) CAF_VOID_STMT
  -# define CAF_BEFORE_SENDING_DELAYED(self, msg) CAF_VOID_STMT
  +# define CAF_BEFORE_PROCESSING(self, msg) static_cast<void>(0)
  +# define CAF_AFTER_PROCESSING(self, result) static_cast<void>(0)
  +# define CAF_BEFORE_SENDING(self, msg) static_cast<void>(0)
  +# define CAF_BEFORE_SENDING_DELAYED(self, msg) static_cast<void>(0)
  #endif
  } // namespace caf
  