Prevent setting an invalid Zend_Date date in the ApprovalActionQueueModel::setExtendedData()

application/modules/requests/models/ApprovalActionQueueModel.php

@@ -324,6 +324,8 @@ class Requests_ApprovalActionQueueModel extends Requests_ApprovalActionModel
                 continue;
             }
             $date = new Zend_Date();
+            $date->setDay(1);
+
             $date->setYear($dateParts['year']);
             $date->setMonth($dateParts['month']);
             $date->setDay($dateParts['day']);