Fix various PHP code bugs found using static analysis (#1489086)

Aleksander Machniak

2013-05-06 187cf5e1cdee87fb1d26599f93202222bb7b8a4b

 plugins/password/drivers/pam.php

@@ -11,7 +11,8 @@
{
    function save($currpass, $newpass)
    {
        $user = $_SESSION['username'];
        $user  = $_SESSION['username'];
        $error = '';

        if (extension_loaded('pam') || extension_loaded('pam_auth')) {
            if (pam_auth($user, $currpass, $error, false)) {