432013: CVE-2008-0658 openldap: slapd crash on modrdn operation with NOOP control on entry in bdb storage

Source: upstream, 
http://www.openldap.org/its/index.cgi/Software%20Bugs?id=5358
http://www.openldap.org/devel/cvsweb.cgi/servers/slapd/back-bdb/modrdn.c.diff?r1=1.197&r2=1.198

===================================================================
RCS file: /repo/OpenLDAP/pkg/ldap/servers/slapd/back-bdb/modify.c,v
retrieving revision 1.124.2.16
retrieving revision 1.124.2.17
--- servers/slapd/back-bdb/modrdn.c     2008/01/11 03:01:37     1.197
+++ servers/slapd/back-bdb/modrdn.c     2008/02/07 11:06:24     1.198
@@ -739,6 +739,8 @@
 		} else {
 			rs->sr_err = LDAP_X_NO_OPERATION;
 			ltid = NULL;
+			/* Only free attrs if they were dup'd.  */
+			if ( dummy.e_attrs == e->e_attrs ) dummy.e_attrs = NULL;
 			goto return_results;
 		}