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-oss: Agentic RL Environments (MiMo RL release). 🐛 Bug Label contour values that are < 0 act the same as contour value of 0, ie. the whole label is filled in. To Reproduce 1. Create a labels layer with some labels 2. Use the GUI to…