Actor Rick Moranis was sucker punched by an unknown assailant while walking Thursday on a sidewalk near New York’s Central Park, a law enforcement official told the Associated Press.Surveillance video shows a man wearing a black “I (heart) NY” sweatshirt and a backpack hitting the 67-year-old “Ghostbusters” star and knocking him to the ground around 7:24 a.m. Thursday.The attack happened just a few blocks from