WinNT MPM: Fix a broken log message at termination.

PR: 28063
Submitted by: Eider Oliveira <eider bol.com.br>
Reviewed by: Jeff Trawick


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@104652 13f79535-47bb-0310-9956-ffa450edef68