* Check return value of apr_bucket_read when storing the response body to disk.

  Delete already cached data if an error occurs.

Submitted by: Brian Akins <brian.akins turner.com>
Reviewed by: Ruediger Pluem


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@389697 13f79535-47bb-0310-9956-ffa450edef68