oval fts: Don't return nonexistent paths
oval fts: Don't return nonexistent paths

fts_read() happily returns an entry for a nonexistent path if it was
specified as an argument to fts_open(). Add a call to stat() to verify
the path actually exists. Symlinks without an existing target are
considered OK.

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