Ticket #675 (new bug)

Description

I think that here there is an actual bug, but cannot find out what it is about.

Invitation of a friend :

Fatal error: Uncaught exception 'Exception' with message 'The recipients parameter must either be a valid string email address, an instance of Swift_RecipientList or an instance of Swift_Address.' in /home/bwrox/http://www.bewelcome.org/htdocs/bw/lib/swift/Swift.php:338 Stack trace: #0 /home/bwrox/http://www.bewelcome.org/htdocs/bw/lib/mailer.php(346): Swift->send(Object(Swift_Message), 'benigon@hotmail...', 'message@bewelco...') #1 /home/bwrox/http://www.bewelcome.org/htdocs/bw/lib/mailer.php(51): bw_sendmail('benigon@hotmail...', 'Curious about t...', '??