Cast to uint8 in prep_data

[LoaferCH]

If preprocessing is present, image is casted to uint8. This can be a problem, if the data is already preprocessed (e.g. in range 0-1), so the images becomes all zeros.

innofw/innofw/core/datasets/utils.py

Line 12 in f0bfa99

sample = transform(image=image.astype("uint8"), mask=mask.astype("uint8"))

The cast should be removed.