By Mark Zeigler From The San Diego Union-Tribune TOKYO—Stefan Schauffele was an aspiring decathlete in Germany 40 years ago when a drunk driver slammed into his car head-on near Weisbaden. His windshield was shattered. So was his life. A shard of glass wedged in his left eye, and six surgeries couldn’t save it. The two years away from his sport and the loss of an eye ended his Olympic dreams and sent him hurtling into depression and alcoholism. “A dark time,” Stefan has said. The cloud had a silver lining, though. He moved to the United States to start a new life, became a golf coach and met his wife at U.S. International University (now Alliant) in San Diego. They had a son who would become a professional golfer and who beginning Wednesday afternoon (San Diego time) will play the opening round of the Olympic tournament at Kasumigaseki Country Club …