Properly check errno to prevent display of a directory index

when server receives a long enough URL to confuse stat().
Reviewed by: Randy Terbush, Marc Slemko
Submitted by: Marc Slemko


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@77433 13f79535-47bb-0310-9956-ffa450edef68