ST.PETERSBURG, Russia (Reuters) – A Russian court rejected a $10 million compensation claim against U.S. pop star Madonna on Thursday by a group of anti-gay activists who accused her hurting their feelings by promoting homosexuality at a St.Petersburg concert. Performing in black lingerie with the words "No Fear" scrawled on her back, Madonna attacked a city law adopted in March that imposed fines for spreading homosexual "propaganda". She had earlier called the law a "ridiculous atrocity". …