VATICAN CITY (Reuters) - In the latest Vatican broadside against "The Da Vinci Code", a leading cardinal says Christians should respond to the book and film with legal action because both offend Christ and the Church he founded.Cardinal Francis Arinze, a Nigerian who was considered a candidate for pope last year, made his strong comments in a documentary called "The Da Vinci Code-A Masterful Deception."Arinze's appeal came some 10 days after another Vatican cardinal called for a boycott of the film. Both cardinals asserted that other religions would never stand for offences against their beliefs and that Christians should get...