Security: Add missing NULL at the end of string.

Security: Add missing NULL at the end of string.

I was seeing "-Wno-missing-bracess" and "-Wno-logical-op-parenthese".
This looks exactly like invalid sizes.
I could not find the code that misplaces the NULL but in the process I found a different place where a NULL is in fact missing.
This adds the missing NULL.
I guess if one looks hard enough, then they will find what they are looking for.

It turns out that my original problem is actually two typos in a configuration file.