When attempting to open a non-regular file as a pid file, assign errno rather than printing an uninitialized value.
When attempting to open a non-regular file as a pid file, assign errno rather
than printing an uninitialized value.

pecharmin/bind9,pecharmin/bind9,each/bind9-collab,pecharmin/bind9,pecharmin/bind9,each/bind9-collab,each/bind9-collab,pecharmin/bind9,each/bind9-collab,pecharmin/bind9,each/bind9-collab,each/bind9-collab