Fix using uninitialized value
Fix using uninitialized value

Coverity scan has reported this function may return unitialized value.
Although it is not likely to happen, it is easily to fix it.

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