Fix error in cvrf_parse_element function and add more error handling
Fix error in cvrf_parse_element function and add more error handling

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