PITTSBURGH?Sportsnet and the CBC think they?ve struck it big when four million Canadians tune in to the Stanley Cup playoffs. NBC was ecstatic to an**unce average viewership of five million for Monday?s Game 1 of the Cup final between Nashville and Pittsburgh, a 22 per cent increase over Pittsburgh-San Jose last year.But those numbers pale in comparison to the regular audience in China: 22 million.?We have a lot of people,? said Chinese broadcaster Wei Wu, who calls himself Marvin. ?Viewership is **t a problem.?Indeed, the nation of 1.3 billion people has warmed to hockey in a big way and the NHL...