[Error]: SQL/DB Error --
[You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 1]
SELECT adv_zipcode FROM adverts WHERE adv_userid=

Stack Dump:

db->print_error(string("You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 1"))
    [/home/wwwswin/public_html/lib/class.DB.php:197]

db->query(string("SELECT adv_zipcode FROM adverts WHERE adv_userid="))
    [/home/wwwswin/public_html/lib/class.DB.php:264]

db->get_var(string("SELECT adv_zipcode FROM adverts WHERE adv_userid="))
    [/home/wwwswin/public_html/lib/class.GroupEvent.php:48]

groupevent->initbyid(string("29"))
    [/home/wwwswin/public_html/lib/class.GroupEvent.php:36]

groupevent->groupevent(string("29"))
    [/home/wwwswin/public_html/groups/group_event.php:18]