Fixing asf in pfam. ASF is null when alr is not null.
Fixing asf in pfam. ASF is null when alr is not null.

sgmap/openfisca-core,openfisca/openfisca-core,adrienpacifico/openfisca-core,benjello/openfisca-core,openfisca/openfisca-core,benjello/openfisca-core