Apple is offering a $45 credit to Canadian iPod owners as part of a class-action settlement. The credit is available to Canadian residents who own a first-, second-, or third-generation iPod purchased before June 24, 2004. The settlement is a result of a suit by two iPod owners angry over the battery life of their devices, which they claim dropped to three hours (from Apple’s claim of eight) after just one year of use. As many as 80,000 Canadians…