Fix the error logging in mod_cgi; the recent error log changes

introduced a bug that prevented it from working correctly.

PR: 1352
Obtained from:
Submitted by:	M.D.Parker <mdpc@netcom.com>
Reviewed by:	Marc Slemko, Dean Gaudet, Ken Coar


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@79530 13f79535-47bb-0310-9956-ffa450edef68