Penny Marshall didn't like the little version of "Big." The former "LaVerne and Shirley" star was in Madison, Wis., Monday to lobby on behalf of a proposed federal law to protect the artistic integrity of films and told reporters she was angered after seeing an edited version of "Big" on an airplane. An intimate scene had been edited to a montage of the actors' faces in order to meet airline regulations, and Marshall, who directed the film, said the result was ridiculous. "It was embarassing to all concerned, but they didn't care," she said.