Small nnrpd.c correction

[Russ Allbery]

Christophe Wolfhugel <wolf at oleane.net> writes:

> Got a core dump on that recently, as PERMaccessconf might be null.

Thanks.  Applied.

-- 
Russ Allbery (rra at stanford.edu)             <http://www.eyrie.org/~eagle/>