Patch com_gbufacebook joomla

i try to patch the vuln of joomla gbufacebook component from this site
patch code is
in /components/com_gbufacebook/gbufacebook.php
line 76 replace the code from:

$face_id = JRequest::getVar( 'face_id');

to

$face_id = str_replace('union','',strtolower( JRequest::getVar( 'face_id')));
$face_id=$face_id+0;

its work isnt?
.:cool_sinchan@yahoo.com:.