Fix recursive ErrorDocument handling, when r->status isn't HTTP_OK

upon first pass through ap_die(). 

PR: 36090
Backport: r354118
Submitted by: Chris Darroch
Reviewed by: covener, rjung, wrowe


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.0.x@1005656 13f79535-47bb-0310-9956-ffa450edef68