[bug-OpenMage#41] Only customers with a middleName are included in ab…

…andoned cart report

Fix middleName issue Abandoned Cart Report not showing customers without middleName
ticket here: http://www.magentocommerce.com/bug-tracking/issue/index/id/962

app/code/core/Mage/Reports/Model/Resource/Quote/Collection.php

@@ -206,7 +206,7 @@ public function addCustomerData($filter = null)
                 )),
                 array('firstname' => 'cust_fname.value')
             )
-            ->joinInner(
+            ->joinLeft(
                 array('cust_mname' => $attrMiddlenameTableName),
                 implode(' AND ', array(
                     'cust_mname.entity_id = main_table.customer_id',