yiisoft/yii2 — pull request #2695 by ZhandosKz (2014-03-10 18:24:33+00:00)
Title: Fix is empty file validator

minor changes in isEmpty method for FileValidator, because that method always return true if validate multiple files.
Bug flow, if we validate multiple files, and run `$model->validate()`, in [Validator::validateAttributes!](https://github.com/yiisoft/yii2/blob/master/framework/validators/Validator.php#L188) $skip always true :-(