Fix extraction of an SCT list from a stapled OCSP response.

The hard-coded 2 byte offset to get to the list (in lieu of
the proper logic) didn't survive the addition of the SCT
from an additional log.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1645546 13f79535-47bb-0310-9956-ffa450edef68