found out he had stage 4 cancer last month, has been told he has anything from a few weeks to a year or two left — although his friends are hoping he “outlives the odds.” Diamond — who played lovable Screech Powers in the teen sitcom — has told pals his last wishes are to meet his idol Justin Chancellor, the British bassist from heavy metal band Tool, and visit the “Star Wars” exhibit at Disney World in Florida.“We do not have any specific timelines, but we know that Dustin needs a miracle to