make_copy decorator not working for lattice defined as list

[swhite2401]

The make copy decorator in lattice/utils.py accepts list but uses the function ring.replace() that only works for lattice objects. This was causing problems in the disable_varelem function in tracking/utils.py

Two corrective actions are proposed: -disable element only when they vary and their passmethod is not already identitypass -catch error in case the lattice is a list and do not use the replace() function

[swhite2401]

I agree... you have better ideas?

[lfarv]

None better, it does not really matters…

[swhite2401]

OK I merge