Fix for bug #20420 (https://gna.org/bugs/?20420).
The problem was in the generic_fns.mol_res_spin.create_spin() function. The index_molecule() and index_residue() functions where not taking alternative, non-current data pipes into account.
Authored by: bugman 2013-01-10
Parent: [r18189]
Child: [r18191]
