bug: fixed a long-standing bug which resulted in too large supercell structures for tiling
bug: fixed a long-standing bug which resulted in too large supercell structures for tiling

Now tiling will produce the correct supercell indices

Signed-off-by: Nick Papior <81a73bca3d342ffee33d7cf845fdbf77b6553831@gmail.com>

zerothi/sisl,zerothi/sisl