(ITS#6616) back-sql crashing

[rex.johnston@gmail.com]

Full_Name: Rex Johnston
Version: cvs
OS: debian
URL: ftp://ftp.openldap.org/incoming/
Submission from: (NULL) (123.255.40.107)


Attempting to create an inetOrgPerson interface to a proprietary database
schema.
Obviously something wrong at this stage, causes slapd to SEGV.

gdb tells me that in servers/slapd/back-sql/entry-id.c:backsql_id2entry()
bsi->bsi_oc is null going into this call.

	rc = attr_merge_normalize_one( bsi->bsi_e,
			slap_schema.si_ad_objectClass,
			&bsi->bsi_oc->bom_oc->soc_cname,
			bsi->bsi_op->o_tmpmemctx );

Without any time to absorb any implications, adding this just before the above
call

 	// added without any clue...  Rex
	if ( eid->eid_oc == NULL )
		return LDAP_NO_SUCH_OBJECT;

fixes the SEGV, but not my interface.