[Done 1.3.8] Error in admin/languages.php

[a_berezin]

admin/languages.php
find

        $lng = $db->Execute("select languages_id
                             from " . TABLE_LANGUAGES . "
                             where code = '" . DEFAULT_CURRENCY . "'");

        if ($lng->fields['languages_id'] == $lID) {
          $db->Execute("update " . TABLE_CONFIGURATION . "
                        set configuration_value = ''
                        where configuration_key = 'DEFAULT_CURRENCY'");
        }

replace by

        $lng = $db->Execute("select languages_id
                             from " . TABLE_LANGUAGES . "
                             where code = '" . DEFAULT_LANGUAGE . "'");

        if ($lng->fields['languages_id'] == $lID) {
          $db->Execute("update " . TABLE_CONFIGURATION . "
                        set configuration_value = ''
                        where configuration_key = 'DEFAULT_LANGUAGE'");
        }