Bug in Captive Portal voucher system

[helixxx]

I'm posting this again since this is still not working in
2.1-DEV, snapshot from Wed May 2 10:06:09 EDT 2012

Description:
When using captive portal with local user manager, any attempt to enter a voucher will result in "Invalid credentials specified". Doesn't matter if the voucher is valid or not.

Fix:
Add an isset() around the $config['voucher'][$cpzone]['enable'] in line 143 /usr/local/captiveportal/index.php

like so:

} else if (isset($config['voucher'][$cpzone]['enable']) && $_POST['accept'] && $_POST['auth_voucher']) {

[cmb]

fixed, thanks