message: fix variable name typos in ospTutorialBoxes
diff: @@ -51,12 +51,12 @@ int main(int argc, const char **argv)
  // create the world which will contain all of our geometries
  OSPWorld world = ospNewWorld();
  - // add in spheres geometry
  - OSPTestingGeometry spheres =
  + // add in boxes geometry
  + OSPTestingGeometry boxes =
  ospTestingNewGeometry("boxes", renderer_type.c_str());
  - ospAddGeometryInstance(world, spheres.instance);
  - ospRelease(spheres.geometry);
  - ospRelease(spheres.instance);
  + ospAddGeometryInstance(world, boxes.instance);
  + ospRelease(boxes.geometry);
  + ospRelease(boxes.instance);
  // commit the world
  ospCommit(world);
  @@ -76,7 +76,7 @@ int main(int argc, const char **argv)
  // frame buffer and camera directly
  auto glfwOSPRayWindow =
  std::unique_ptr<GLFWOSPRayWindow>(new GLFWOSPRayWindow(
  - vec2i{1024, 768}, (box3f &)spheres.bounds, world, renderer));
  + vec2i{1024, 768}, (box3f &)boxes.bounds, world, renderer));
  glfwOSPRayWindow->registerImGuiCallback([&]() {
  static int spp = 1;
  