[FIX] l10n_th_doctype_invoice, problem double post number

Author: kittiu

l10n_th_doctype_invoice/models/account.py

@@ -22,5 +22,5 @@ def post(self):
                     # Because we have doctype_id, so we can pass False
                     name = self.env['ir.sequence'].next_by_id(False)
                     move.name = name
-                    invoice.number = name
+                    invoice.write({'number': name, 'internal_number': name})
         return super(AccountMove, self).post()