By JOHN KEKIS One of these days, German teenager Felix Loch figures he'll win a World Cup luge race. For now, he'll settle for the world championships.The 19-year-old Loch easily held off five-time world champion and two-time defending Olympic champion Armin Zoeggeler of Italy on Saturday to win his second straight title at the luge world championships."I just thought I'd have to do two solid runs, that's all," said Loch, who tore two shoulder ligaments during a November crash on the Olympic track at Whistler.