LOS ANGELES - Comedian Rodney Dangerfield (news) was hospitalized Tuesday for heart valve replacement surgery. Dangerfield, 82, underwent brain surgery last year to reduce his chances of having a stroke during the heart operation. Asked how long he would remain in the hospital after Wednesday's operation, he said: "If things go right, I'll be there about a week, and if things don't go right, I'll be there about an hour and a half." The comic and actor, best known for his self-mocking line, "I don't get no respect," recently released his autobiography, "It's Not Easy Being Me: A Lifetime of...