Signup fails for new email addresses via shortcode

[tedmsuperstar]

When I try to sign up through the shortcode with a new email address, the list is updated on the sailthru side, but the server throws a 500 and the user doesn't see a "Thank You" message.

$profile is initialized as a boolean here https://github.com/sailthru/sailthru-wordpress-plugin/blob/master/widget.subscribe.php#L377

For a new email address, an error will be tried/caught here: https://github.com/sailthru/sailthru-wordpress-plugin/blob/master/widget.subscribe.php#L380

So far, $profile is still set to false.

We pass $profile into a function here https://github.com/sailthru/sailthru-wordpress-plugin/blob/master/widget.subscribe.php#L429

That function's signature requires $profile to be an array, not a bool here: https://github.com/sailthru/sailthru-wordpress-plugin/blob/master/widget.subscribe.php#L429

And we get a 500.