MGM Resorts International (MGM) found it hard to coax players to buy amenities at its casinos at the end of 2012. Before the market opened Wednesday, it reported a worse fourth-quarter loss than the same quarter last year. But shares rose in early trading on hopes for better results this year amid expansion moves in Macau, the world's top gambling destination. MGM recorded a 23-cent per share loss, vs. a 21-cent loss a year ago, a penny worse than