Fixes problem with OpenLDAP server configuration in Solaris.

Patch was generated from upstream.

--- openldap-2.4.30/servers/slapd/overlays/deref.c.old Fri Jun 26 13:59:18 2015

+++ openldap-2.4.30/servers/slapd/overlays/deref.c Fri Jun 26 13:59:40 2015

@@ -182,7 +182,8 @@

ber_len_t cnt = sizeof(struct berval);

ber_len_t off = 0;

- if ( ber_scanf( ber, "{m{M}}", &derefAttr, &attributes, &cnt, off ) == LBER_ERROR )

+ if ( ber_scanf( ber, "{m{M}}", &derefAttr, &attributes, &cnt, off ) == LBER_ERROR

+ || !cnt )

{

rs->sr_text = "Dereference control: derefSpec decoding error";

rs->sr_err = LDAP_PROTOCOL_ERROR;