scoreboard: hide diff of deviation if zero
scoreboard: hide diff of deviation if zero

em92/quakelive-local-ratings,em92/pickup-rating,em92/quakelive-local-ratings,em92/pickup-rating,em92/quakelive-local-ratings,em92/pickup-rating,em92/quakelive-local-ratings,em92/quakelive-local-ratings