Hockey Chat:  Carlton "Mac" McDiarmid, a long-time goal judge at the Montreal Forum, recalls one of his first NHL games in the early 1970s. When a Toronto Maple Leaf player wound up to take a slap shot at his net, he excitedly, and prematurely, signaled a goal. The puck was stopped by the net minder.  Referee Andy Van Hellemond came up to him between periods to offer him some sound goal-judge advice. "He said, 'Look, Mac, it's better to be a second late than a second early.' "