Description:
------------
I'm trying to use stomp extension to read message from activeMQ.
But when the activeMQ has shut down, the Stomp::hasFrame function returns true.

Test script:
---------------
try {
    $stomp = new Stomp($hosts);
    $stomp->subscribe($queue);
    sleep(10); // shut down activeMQ quickly
    $hasFrame = $stomp->hasFrame($queue);
    var_dump($hasFrame);
    if ($hasFrame) {
        // read frame
    }
} catch (StompException $e) {
    echo $e->getCode(), ': ', $e->getMessage(), PHP_EOF;
}