extConf iconHook active by default breaks TYPO3 6.2

[vaxul]

If installing the extension within TYPO3 6.2 it breaks TYPO3 with PHP fatal error.

If is extConf iconHook activate it calling the IconRegistry in ext_localconf.php

PHP Fatal error: Class 'TYPO3\CMS\Core\Imaging\IconRegistry' not found in /var/www/html/typo3/typo3_src/typo3/sysext/core/Classes/Utility/GeneralUtility.php on line 4469"

To workaround I have to manually edit the LocalConfiguration.php:

array(
	'EXT' => array(
		'extConf' => array(
// Set s:1: to 0
			'cs_cdn' => 'a:4:{s:10:"uploadHook";s:0:"";s:8:"iconHook";s:1:"0";s:6:"apiKey";s:0:"";s:6:"zoneId";s:0:"";}',
		),
	),
)