bb_get_forum_dropdown adds extra quote quotation in error

[chrishajer]

http://bbpress.org/forums/topic/malformed-html-created-by-bb_get_forum_dropdown

When generating a dropdown menu, bb_get_forum_dropdown (from bb-includes/functions.bb-template.php) adds an extra quotation mark inside the select tag like this:
<select name="forum_id" id="forum-id"">

When it should be like this:
<select name="forum_id" id="forum-id">

The offending line is right here:

$r .= '<select name="' . $name . '" id="' . $id . '"' . $tab . '">' . "\n";

To fix this, change it to:
$r .= '<select name="' . $name . '" id="' . $id . '"' . $tab . '>' . "\n";

#1199