TYPO3 Core

Hello core team,

if only the default language is selected during fallback in the site configuration, the query in the file sysext/core/Classes/Site/Entity/SiteLanguage.php in line 153-155 no longer works because the query

if (!empty($attributes['fallbacks']))

fails because the array Attributes contains

fallbacks => '0'.

Instead, it should be checked for isset here.

Incorrect:

if (!empty($attributes['fallbacks'])) {
    $this->fallbackLanguageIds = is_array($attributes['fallbacks']) ? $attributes['fallbacks'] : explode(',', $attributes['fallbacks']);
}

Correct:

if (isset($attributes['fallbacks'])) {
    $this->fallbackLanguageIds = is_array($attributes['fallbacks']) ? $attributes['fallbacks'] : explode(',', $attributes['fallbacks']);
}