The bookseller gains an edge in its fight against wealthy L.A. investor Ronald Burkle as stockholders vote for Leonard Riggio and two other company nominees rather than Burkle's slate of candidates for the board of directors.Barnes & Noble Inc. scored a major victory in its fight against Los Angeles billionaire investor Ronald Burkle on Tuesday, announcing at the bookseller's annual meeting that its shareholders had voted to keep Chairman Leonard Riggio and two other company nominees on its board of directors and rejected Burkle's dissident slate.