The advance word on "Leonard Part 6," Columbia Pictures' big Christmas movie opening Dec. 18, is not good. Says who? None other than the film's star and producer Bill Cosby. Cosby recently said on CNN that he "was not tickled with" the version of the film that he saw. Cosby, who estimated the cost of "Leonard" at $20 million, said he hoped that subsequent editing improves the movie but added that he didn't want his fans thinking he was endorsing it as "a great picture" or even "a good picture." Cosby's advice: "It might be better that these people (fans) wait and have their friends tell them if they like it or not."