Mask to nomask

[BrunoSanchez]

ProperImage/properimage/operations.py

Line 146 in a5ee3b7

mix_mask = np.ma.mask_or(new.data.mask, ref.data.mask)

This uses the default parameter shrink=True of np.ma.mask_or and it reduces the mask to a nomask (a single bool, with False) instead of an image sized array with bool or int 1 or 0 values.

[BrunoSanchez]

This would be the solution?
np.ma.mask_or(new_img.data.mask, ref_img.data.mask, shrink=False)