Don't create empty lines when the closing balance is generated.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@7646 20353a03-c40f-0410-a6d1-a30d3c3de9de

bt5/erp5_accounting/SkinTemplateItem/portal_skins/erp5_accounting/AccountingTransactionModule_createClosingTransaction.xml

@@ -154,6 +154,7 @@ for account in account_list:\n
                       ) or 0.0\n
 \n
       # Create the transaction line for this third party\n
+      if tp_balance != 0.0:\n
         closing_transaction.newContent( portal_type               = \'Accounting Transaction Line\'\n
                                       , source_value              = account\n
                                       , quantity                  = tp_balance\n