When shutting down with worker or event with active processes

which had lost their scoreboard slot during a prior graceful 
restart, calls to ap_unregister_extra_mpm_process() were hidden
if AP_DEBUG (maintainer mode) wasn't defined.

This resulted in an uninitialized generation variable being
passed through to the child_status hook.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1103932 13f79535-47bb-0310-9956-ffa450edef68