message: Don't disable async messaging if it wasn't running in the first place
diff: @@ -74,7 +74,9 @@ namespace ospray {
  {
  using namespace mpicommon;
  const bool asyncWasRunning = asyncMessagingEnabled();
  + if (asyncWasRunning) {
  disableAsyncMessaging();
  + }
  MPIBcastFabric fabric(world, rootGlobalRank, rootGlobalRank);
  