Fix one off error
Fix one off error

We need to allocate one more byte for a terminating null byte in the string.
Then we need to make sure the string is null-terminated.
This prevents many segfaults.

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