slider bug fix
slider bug fix

ustbhuangyi/better-scroll,ustbhuangyi/better-scroll,ustbhuangyi/better-scroll,neurotoxinvx/better-scroll,TotooriaHyperion/better-scroll,neurotoxinvx/better-scroll,neurotoxinvx/better-scroll,TotooriaHyperion/better-scroll,TotooriaHyperion/better-scroll,ustbhuangyi/better-scroll