Warner Bros. has acquired screen rights to the book “One of a Kind: The Rise and Fall of Stuey `The Kid’ Ungar,” about one of poker’s biggest stars and its most tragic casualty. The deal comes just as the World Series of Poker gets under way in Las Vegas and the book by Nolan Dalla and Peter Alson hits bookstores. Ungar came from nowhere to best seasoned card players, winning back-to-back World Series of Poker crowns by his mid-20s. He cashed an estimated $30 million in chips over his short career. His self-destructive personality led him to run through that entire fortune, and he was penniless by the time he died of a drug overdose in Las Vegas in 1998.