An 87-year-old Utah man died Friday from a head injury he received four days earlier aboard a cruise ship off the Big Island.  The Honolulu Medical Examiner's Office identified the man as James C. Harte of Salt Lake City, Utah.  He fell and hit his head at 10:30 p.m. Monday. He was flown Thursday to Oahu for treatment and he died Friday at about 10:30 p.m. Police don't suspect foul play. An autopsy will be performed Monday.