Fixed an off-by-one issue in the `bitmap.div` function from the ptypes library and corrected a few functions that deal with signed bitmaps
Fixed an off-by-one issue in the `bitmap.div` function from the ptypes library and corrected a few functions that deal with signed bitmaps

arizvisa/syringe,arizvisa/syringe,arizvisa/syringe,arizvisa/syringe,arizvisa/syringe