Fix for a bug that I introduced when eliminating the single-byte

reads in mod_cgi: eof wasn't treated as an error condition when
reading the script headers, so we were delivering a 200 when a
CGI script produced no output.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@94342 13f79535-47bb-0310-9956-ffa450edef68