ZURICH (Reuters) – The owner of a luxury goods shop in Zurich has denied that racism was involved when Oprah Winfrey was discouraged from buying a 35,000 Swiss franc ($38,100) handbag. The U.S. talk show host, recently named the world's most powerful celebrity, was in Switzerland for the wedding of singer Tina Turner when the incident occurred last month. The broadcaster said in two U.S. interviews that a sales assistant had refused to show her the crocodile handbag, saying it was "too expensive" and steering her towards other, cheaper ones. …