installer detects timezone incorrectly

In openSUSE 13.1 x86_64 with timezone set to "Europe/Berlin", the installer (ispconfig git e4bc4a93) writes the following into /usr/local/ispconfig/interface/lib/config.inc.php:

$conf['timezone'] = '..Europe/Berlin';

Note the ".." at the beginning. This is probably because /etc/localtime is a relative symlink:

ls -l /etc/localtime

lrwxrwxrwx 1 root root 35 10. Mär 16:27 /etc/localtime -> ../usr/share/zoneinfo/Europe/Berlin