[FIX] Account_tax_include : Minor modif

bzr revid: jvo@tinyerp.com-20091221124309-nmu8hzq21ocr89n0

addons/account_tax_include/invoice_tax_incl.py

@@ -24,6 +24,7 @@ import time
 import netsvc
 from osv import fields, osv
 import ir
+from tools import config
 
 class account_invoice(osv.osv):
     _inherit = "account.invoice"