Added missing error messages for fetchmail form.

interface/web/mail/lib/lang/en_mail_get.lng

@@ -11,5 +11,5 @@ $wb["limit_fetchmail_txt"] = 'The max. number of Fetchmail records for your acco
 $wb["source_server_error_isempty"] = 'Server is empty.';
 $wb["source_username_error_isempty"] = 'Username is empty.';
 $wb["source_password_error_isempty"] = 'Password is empty.';
-$wb["destination_error_isemail"] = 'No destination selcted.';
+$wb["destination_error_isemail"] = 'No destination selected.';
 ?>
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