mod_ldap: fix a bogus error message to tell the user which file

is causing a potential problem with the LDAP shared memory cache.
PR:	31431
Obtained from:
Submitted by:
Reviewed by:	minfrin, bnicholes, jim


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/APACHE_2_0_BRANCH@105425 13f79535-47bb-0310-9956-ffa450edef68