Upgrade PHP Notices

```
$ wp --allow-root core update --version=3.8.2
Downloading WordPress 3.8.2 (hu_HU)...
Frissítés letöltése: (https://hu.wordpress.org/wordpress-3.8.2-hu_HU.zip) ...
Frissítés kicsomagolása......
PHP Notice:  Undefined property: stdClass::$version in /home/klevi/public_pm3/server/wp-admin/includes/class-wp-upgrader.php on line 1427
Notice: Undefined property: stdClass::$version in /home/klevi/public_pm3/server/wp-admin/includes/class-wp-upgrader.php on line 1427
Success: WordPress updated successfully.
```