FIX #5465 - Fix type account_parent

htdocs/install/mysql/tables/llx_accounting_account.key.sql

 -- ============================================================================
 -- Copyright (C) 2003      Rodolphe Quiedeville <rodolphe@quiedeville.org>
--- Copyright (C) 2005-2006 Laurent Destailleur  <eldy@users.sourceforge.net>
+-- Copyright (C) 2005-2016 Laurent Destailleur  <eldy@users.sourceforge.net>
 --
 -- This program is free software; you can redistribute it and/or modify
 -- it under the terms of the GNU General Public License as published by
@@ -21,8 +21,6 @@
 ALTER TABLE llx_accounting_account ADD INDEX idx_accounting_account_fk_pcg_version (fk_pcg_version);
 ALTER TABLE llx_accounting_account ADD INDEX idx_accounting_account_account_number (account_number);
 
---ALTER TABLE llx_accounting_account ADD CONSTRAINT fk_accounting_account_fk_account_number FOREIGN KEY (fk_account_number) REFERENCES llx_accounting_account (account_number);
-
 
 -- This keys are created into foreign table after creation of foreign index
 --ALTER TABLE llx_accounting_account ADD CONSTRAINT fk_accounting_account_fk_pcg_version    FOREIGN KEY (fk_pcg_version)    REFERENCES llx_accounting_system (pcg_version);

htdocs/install/mysql/tables/llx_accounting_account.sql

@@ -29,7 +29,7 @@ create table llx_accounting_account
   pcg_type        			varchar(20)  NOT NULL,
   pcg_subtype     			varchar(20)  NOT NULL,
   account_number  			varchar(32)  NOT NULL,
-  account_parent  			integer DEFAULT 0,							-- Hierarchic parent
+  account_parent  			varchar(32)  DEFAULT '',							-- Hierarchic parent
   label           			varchar(255) NOT NULL,
   fk_accounting_category 	integer DEFAULT 0,
   fk_user_author  			integer DEFAULT NULL,