KARACHI - A Pakistani election tribunal on Monday dismissed a petition to bar opposition leader and former premier Benazir Bhutto from contesting next monthÂ’s elections, court officials said. A candidate from the former ruling party which backs President Pervez Musharraf had sought BhuttoÂ’s disqualification from standing in her southern hometown constituency of Larkana.The petition said that Bhutto should be ineligible because of sentences passed down by anti-graft courts five years ago, the officials said on condition of anonymity. But after arguments from BhuttoÂ’s lawyers that the sentences had already been overturned by the Supreme Court, tribunal judges threw out the petition, the officials said.