Fix a bug that the time benchmark does not works when method=user and scale=1
Fix a bug that the time benchmark does not works when method=user and scale=1

nagadomi/waifu2x,Spitfire1900/upscaler,nagadomi/waifu2x,nagadomi/waifu2x,nagadomi/waifu2x,Spitfire1900/upscaler,nagadomi/waifu2x