message: OSPDevice is _not_ compatible with OSPObject...reflect this fact in ospray.h
diff: @@ -137,8 +137,9 @@ namespace osp {
  typedef uint64_t uint64;
  + struct Device;
  +
  struct ManagedObject { uint64 ID; virtual ~ManagedObject() {} };
  - struct Device : public ManagedObject {};
  struct FrameBuffer : public ManagedObject {};
  struct Renderer : public ManagedObject {};
  struct Camera : public ManagedObject {};
  