Merge r385580 from 2.2.x:

    * merge fix to mod_speling crash when r->filename is not set

Reviewed by: jerenkrantz, jim


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.0.x@390518 13f79535-47bb-0310-9956-ffa450edef68