[FIX] digits

__init__.py

@@ -1,2 +1,3 @@
 # -*- coding: utf-8 -*
-import controllers
+import controllers
+import models

models/__init__.py

@@ -0,0 +1,3 @@
+# -*- coding: utf-8 -*-
+import account_invoice_line
+import sale_order_line

models/account_invoice_line.py

@@ -0,0 +1,7 @@
+# -*- coding: utf-8 -*-
+from openerp import models, fields
+
+class AccountInvoiceLine(models.Model):
+    _inherit = 'account.invoice.line'
+
+    discount = fields.Float(digits=(12,9))

models/sale_order_line.py

@@ -0,0 +1,7 @@
+# -*- coding: utf-8 -*-
+from openerp import models, fields
+
+class SaleOrderLine(models.Model):
+    _inherit = 'sale.order.line'
+
+    discount = fields.Float(digits=(12, 9))