Fix logic error in providing a nice failure message for a missing expat-lite

directory. No real configuration changes/effects.

Submitted by: Jim Jagielski <jim@jaguNET.com>


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@91308 13f79535-47bb-0310-9956-ffa450edef68