SUNRISE, Fla. — Wayne Gretzky walked into the green room at TNT studios, looked at ringleader Liam McHugh and fellow analysts Paul Bissonnette, Anson Carter and Henrik Lundqvist and chirped, “Hope we don’t get overtime tonight, boys.” The production people, well-trained to never, ever say the “O” word, gasped. Advertisement “Don’t say overtime!” they told the Great One. Gretzky laughed: “Do you really think it makes any difference whether I say it or not?” Safe to say Gretzky won’t make that mistake again. Several hours later, Thursday night turned into Friday morning and there was no end in sight to…