Yet another "finest actor of his generation," British-born Malcolm McDowell was performing onstage in a production of "Twelfth Night" when he learned he had landed the role of Mick Travis in Lindsay Anderson's fantasy-tinged satire "If..." (1968). The film, ostensibly about a youthful rebellion in a rigid tradition-ridden British private boarding school, introduced his blithely amoral, anti-authoritarian persona to international audiences and revealed Anderson as one of the more individual and dynamic filmmakers on the British scene. Boyish and charismatic, McDowell, himself just a few years