Use oscap_enum_to_string instead of just index lookup
Use oscap_enum_to_string instead of just index lookup

This fixes a segfault when trying to convert OVAL_AFCFML_UNKNOWN to a
string.

Also fixed a typo in the ODAFAMILY enum string mapping.

OpenSCAP/openscap,mpreisler/openscap,mpreisler/openscap,mpreisler/openscap,jan-cerny/openscap,redhatrises/openscap,redhatrises/openscap,OpenSCAP/openscap,jan-cerny/openscap,redhatrises/openscap,Hexadorsimal/openscap,mpreisler/openscap,Hexadorsimal/openscap,OpenSCAP/openscap,jan-cerny/openscap,redhatrises/openscap,jan-cerny/openscap,OpenSCAP/openscap,OpenSCAP/openscap,Hexadorsimal/openscap,redhatrises/openscap,mpreisler/openscap,jan-cerny/openscap,OpenSCAP/openscap,Hexadorsimal/openscap,jan-cerny/openscap,mpreisler/openscap,Hexadorsimal/openscap,redhatrises/openscap,Hexadorsimal/openscap