fix shutdown hang on Solaris with lots of piped TransferLogs and at

least one piped ErrorLog

Submitted by:   Justin Erenkrantz
Reviewed by:    Greg Ames


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@89340 13f79535-47bb-0310-9956-ffa450edef68