Added ability to get a customer's running balance. It's quite flaky, doesn't tolerate having a grid with sub-pages, is actually incorrect for at least some customers (not sure why), but it helps answer a fundamental question for most customers. If I had a better solution, I would surely go for it.

git-svn-id: file:///svn-source/pmgr/branches/v0.3_work@1036 97e9348a-65ac-dc4b-aefc-98561f571b83

site/controllers/transactions_controller.php

@@ -93,7 +93,8 @@ class TransactionsController extends AppController {
     $fields[] = ("IF(Transaction.type = 'DEPOSIT'," .
 		 "   COUNT(DepositTender.id)," .
 		 "   COUNT(StatementEntry.id)) AS entries");
-    return $fields;
+    return array_merge($fields,
+		       $this->Transaction->LedgerEntry->debitCreditFields(false, true, 'Transaction'));
   }
 
   function gridDataConditions(&$params, &$model) {