Currently:
        public string llGetOwner()
        {
            return m_host.ObjectOwner.ToString();
        }

ObjectOwner is an LLUUID - ToString() makes it a hyphenated UUID.


Change (example):

public LSL_Type.key llGetOwner()
{
      return new LSL_Type.key(m_host.ObjectOwner);
}


-------
LSL_Type.key will have a constructor for LLUUID (and for string, and perhaps more)