A Los Angeles jury says Jean-Claude Van Damme owes nothing to a martial arts expert who claims he collaborated with the actor on a movie script. Frank Dux sued the action star for $1.5 million, claiming Van Damme broke their contract over the 1991 film “The Quest,” which Van Damme both directed and starred in. Dux says the film was similar to the manuscript for “Enter the New Dragon: The Kumite,” which they both wrote. Jury foreman Paul Martinet said jurors found Dux’s testimony less thancredible, including his assertion that an audiotape documenting his oral agreement with the actor was destroyed in the 1994 Northridge earthquake. Dux plans to appeal.