Don't work if URL_REWRITE is not enabled

[Fabrice61]

Hi guys !

Just for your information, when URL Rewriting is not enabled, the mail is sent when you click on [INVITE] but you are then redirected to a page that does not exist -> Error 404.

The problem disappears when the URL Rewriting is enabled.

Many thanks for your plugin !

Fabrice from Normandy, France.

[wladneto]

Hello Fabrice, i sent pull request to fix it.
If you want, check my fork.

Regards.