Label contour values < 0 act the same as 0

Label contour values < 0 act the same as 0: a task in MiMo-V2.6-RL-harbor-code: MiMo-V2.6-RL Code (Harbor) (Harbor dataset). Label contour values that are < 0 act the same as contour value of 0, ie. the whole label is filled in.