Added error messages for malloc calls.

Submitted by:	John Bley <jbb6@acpub.duke.edu>
Reviewed by:	Roy Fielding


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@82867 13f79535-47bb-0310-9956-ffa450edef68