MEXICO CITY, Oct 7 (Reuters) - The post-Dwight Howard era opened on a sour note for the Orlando Magic as the New Orleans Hornets rode a late surge for an 85-80 preseason victory before a packed house at the Mexico City Arena on Sunday. The Magic, in their first game since trading six-time All-Star Howard to the Los Angeles Lakers as part of a blockbuster 12-player trade in August, failed to get ...