Fix another mod_lua compile error.

Compilation now tested against Lus 5.1, 5.2
and 5.3. The libs were compiled with COMPAT
flags set, but mod_lua no longer sets them
so it should compile and run with non-COMPAT
libs as well.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1800833 13f79535-47bb-0310-9956-ffa450edef68