message: fix for only creating the Embree device on first LocalDevice::commit()
diff: @@ -47,6 +47,7 @@ namespace ospray {
  {
  Device::commit();
  + if (!embreeDevice) {
  // -------------------------------------------------------
  // initialize embree. (we need to do this here rather than in
  // ospray::init() because in mpi-mode the latter is also called
  @@ -62,6 +63,7 @@ namespace ospray {
  postStatusMsg() << "#osp:init: embree internal error number " << erc;
  assert(erc == RTC_NO_ERROR);
  }
  + }
  TiledLoadBalancer::instance = make_unique<LocalTiledLoadBalancer>();
  }
  