- For a unified camera the state is determined from the run-level by
  the new function tao_camera_get_state.  For a shared camera, the state
  is a new member of the structure which is retrieved by new function
  tao_shared_camera_get_state.  For remote objects, the state was already
  a member of the structure.

- State TAO_STATE_KILLED renamed TAO_STATE_UNREACHABLE, new state
  TAO_STATE_ERROR to indicate a recoverable error.