Fix mod_cern_meta to not create empty metafiles when the

metafile searched for does not exist.

PR:             12353
Submitted by:   Owen Rees <owen_rees@hp.com>


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@98561 13f79535-47bb-0310-9956-ffa450edef68