* modules/ssl/ssl_engine_vars.c (ssl_var_lookup_ssl): Fix segfault if

SSL_get_session() returns NULL.

PR: 15057
Submitted by: Otmar Lendl <lendl@nic.at>
Reviewed by: Joe Orton, Jeff Trawick, Andr�� Malo


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/APACHE_2_0_BRANCH@102459 13f79535-47bb-0310-9956-ffa450edef68