Update UploadBehavior.php
Update UploadBehavior.php

Changed a strlen for an empty to prevent a warning which can be thrown if the array dimension doesn't exist
josegonzalez/cakephp-upload,silviolleite/cakephp-upload,ramiroaraujo/cakephp-upload,amstegraf/cakephp-upload,Phillaf/cakephp-upload