A Libyan court has ruled that the son of the late leader Muammar Gaddafi could run for president, his lawyer said, as arguments intensified over the conduct of an election aimed at ending a decade of turmoil. Saif al-Islam Gaddafi's appeal against disqualification for the December 24 vote was delayed for days as fighters blocked off the court, one of several incidents that may foreshadow wider election unrest. In another incident on Thursday, the elections commission said armed men had stormed five election centres in western Libya, stealing ballot cards. Analysts fear a contested vote, or one with clear violations,…