eliminated copying suit_histogram to detect flushes and minimized the amount of work we do when detecting flushes by only proceeding if max_suit == 3 after processing flat_board
eliminated copying suit_histogram to detect flushes and minimized the amount of work we do when detecting flushes by only proceeding if max_suit == 3 after processing flat_board

ktseng/holdem_calc,masaka9/holdem_calc