[probes] file: fix nil filename processing
[probes] file: fix nil filename processing

OpenSCAP/openscap,OpenSCAP/openscap,OpenSCAP/openscap,redhatrises/openscap,postfix/openscap,openprivacy/openscap,jan-cerny/openscap,redhatrises/openscap,isimluk/openscap,jan-cerny/openscap,redhatrises/openscap,openprivacy/openscap,openprivacy/openscap,openprivacy/openscap,Hexadorsimal/openscap,redhatrises/openscap,ybznek/openscap,Hexadorsimal/openscap,OpenSCAP/openscap,mpreisler/openscap,mpreisler/openscap,ybznek/openscap,Hexadorsimal/openscap,OpenSCAP/openscap,OpenSCAP/openscap,ybznek/openscap,isimluk/openscap,mpreisler/openscap,jan-cerny/openscap,ybznek/openscap,postfix/openscap,mpreisler/openscap,postfix/openscap,postfix/openscap,isimluk/openscap,isimluk/openscap,isimluk/openscap,jan-cerny/openscap,jan-cerny/openscap,Hexadorsimal/openscap,mpreisler/openscap,Hexadorsimal/openscap,Hexadorsimal/openscap,ybznek/openscap,redhatrises/openscap,openprivacy/openscap,postfix/openscap,redhatrises/openscap,postfix/openscap,openprivacy/openscap,mpreisler/openscap,jan-cerny/openscap,ybznek/openscap,isimluk/openscap