Fixed a bug.
Fixed a bug.

ParamRoles are not in one-to-one relation with Roles! A Role
could be associated with more than one ParamRole (in fact, we expect
that).

OrlyMar/gasistafelice,kobe25/gasistafelice,matteo88/gasistafelice,OrlyMar/gasistafelice,michelesr/gasistafelice,kobe25/gasistafelice,OrlyMar/gasistafelice,feroda/gasistafelice,kobe25/gasistafelice,befair/gasistafelice,befair/gasistafelice,michelesr/gasistafelice,feroda/gasistafelice,OrlyMar/gasistafelice,befair/gasistafelice,befair/gasistafelice,kobe25/gasistafelice,matteo88/gasistafelice,matteo88/gasistafelice,feroda/gasistafelice,michelesr/gasistafelice,michelesr/gasistafelice,feroda/gasistafelice,matteo88/gasistafelice