message: Set a status func in the distrib viewer demo
diff: @@ -193,6 +193,7 @@ int main(int argc, char **argv) {
  }
  Device device("mpi_distributed");
  device.set("masterRank", 0);
  + ospDeviceSetStatusFunc(device.handle(), [](const char *msg) { std::cout << msg << "\n"; });
  device.commit();
  device.setCurrent();
  @@ -249,7 +250,6 @@ int main(int argc, char **argv) {
  Renderer renderer("mpi_raycast");
  // Should just do 1 set here, which is read?
  - renderer.set("world", model);
  renderer.set("model", model);
  renderer.set("camera", camera);
  renderer.set("bgColor", vec3f(0.02));
  