erp5_accounting: match real invoice

bt5/erp5_accounting/SkinTemplateItem/portal_skins/erp5_accounting/AccountingTransaction_roundDebitCredit.py

@@ -50,7 +50,10 @@ for line, account_type_list in six.iteritems(account_type_dict):
       break
 
 def roundLine(resource, get_method, set_method, exchange_ratio):
-  precision = context.getQuantityPrecisionFromResource(resource)
+  if resource == 'currency_module/EUR':
+    precision = 2
+  else:
+    precision = context.getQuantityPrecisionFromResource(resource)
   total_quantity = 0.0
   for line in line_list:
     line_quantity = round(getattr(line, get_method)() or 0, precision)