Follow-up to r1544745: fix compatibility code for pre-1.3 APR.

* subversion/svnserve/svnserve.c
  (sub_main): fix parameters for non-pooled threads

git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1544747 13f79535-47bb-0310-9956-ffa450edef68