But authorities don't specify which kind the 'Happy Days' star had
                                
                                
                                    (Newser) -
                                    Authorities say former Happy Days star Erin Moran likely died from cancer at her southern Indiana home, reports the  AP . A statement released Monday by the Harrison County Sheriff's Department says an autopsy revealed the 56-year-old actress had stage-four cancer, but doesn't specify what type. The department says...