ITS#1898 ldap_controls_dup malloc() bug fix

CHANGES

@@ -11,6 +11,7 @@ OpenLDAP 2.1.3 Engineering
 	Fixed back-ldap/meta mapping bug (ITS#1787)
 	Add back-monitor added monitorContext support
 	Fixed back-perl ad_cname bug (ITS#1882)
+	Fixed libldap ldap_controls_dup() malloc bug (ITS#1898)
 	Remove lint
 	Build Environment
 		Add monitor backend test
@@ -18,6 +19,8 @@ OpenLDAP 2.1.3 Engineering
 		Fix SASL-less build issues
 		Fix back-perl build issues (ITS#1827)
 		Added -ldb-4 detection (ITS#1888)
+	Documentation
+		Numerous manual page updates
 
 OpenLDAP 2.1.2 Release
 	Initial release for "general" use.

libraries/libldap/controls.c

@@ -285,7 +285,7 @@ ldap_controls_dup( LDAPControl *const *controls )
 		return NULL;
 	}
 
-	new = (LDAPControl **) LDAP_MALLOC( i * sizeof(LDAPControl *) );
+	new = (LDAPControl **) LDAP_MALLOC( (i+1) * sizeof(LDAPControl *) );
 
 	if( new == NULL ) {
 		/* memory allocation failure */