message: update camera aspect ratio on window resize.
diff: @@ -178,6 +178,9 @@ void GLFWOSPRayWindow::reshape(const ospcommon::vec2i &newWindowSize)
  // update camera
  arcballCamera->updateWindowSize(windowSize);
  +
  + ospSetf(camera, "aspect", windowSize.x / (float)windowSize.y);
  + ospCommit(camera);
  }
  void GLFWOSPRayWindow::motion(const ospcommon::vec2f &position)
  