Fixed the problem with zero dollar balance forward entries when closing a ledger.

git-svn-id: file:///svn-source/pmgr/branches/yafr_20090716/site@422 97e9348a-65ac-dc4b-aefc-98561f571b83

controllers/transactions_controller.php

@@ -167,7 +167,7 @@ class TransactionsController extends AppController {
     // have their corresponding account ledgers closed.
     $type_ids = $close_type_ids = array();
     foreach ($this->data['TenderType'] AS $type_id => $type) {
-      if (!$type['checked'])
+      if (empty($type['checked']))
 	continue;
       $type_ids[] = $type_id;