typo fix

public/users/password-recover.php

@@ -59,13 +59,12 @@ if ($_SERVER['REQUEST_METHOD'] === "POST") {
     $start_time = microtime(true);
 
     $username = safepost('fUsername', null);
-    if (empty($sername) || !is_string($username)) {
+    if (empty($username) || !is_string($username)) {
         die("fUsername field required");
     }
 
     $tUsername = escape_string($username);
 
-
     $handler = $context === 'admin' ? new AdminHandler : new MailboxHandler;
     $token = $handler->getPasswordRecoveryCode($tUsername);
     if ($token !== false) {