mod_cern_meta: fix broken file reading loop in scan_meta_file().

We checked the retcode from apr_fgets() improperly.
Submitted by:	Rob Simonson <simo@us.ibm.com>
Reviewed by:	Jeff Trawick


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@86039 13f79535-47bb-0310-9956-ffa450edef68