nodejs_requirements() in nodejs.install needs fixing.

The nodejs_requirements() function calls Nodejs::sendMessage(), and process the result as if it was the object returned by drupal_http_request. This is not the case anymore, as we process http_requests through Nodejs::httpRequest() method.

Right now, if there's not an error, but the Node server is not running, Nodejs::httpRequest() will return FALSE, which will make the following code to run the "else" clause:

    if (isset($response->error)) {
      $result = array(
        'value' => check_plain($response->error),
        'severity' => REQUIREMENT_ERROR,
      );
    }
    else {
      $result = array(
        'value' => check_plain($response->status_message),
        'severity' => REQUIREMENT_OK,
      );
    }

There, it will try to access $response->status_message, but since $response is a boolean, it will cause a WSOD, as it tries to access a property on a non-object variable.

The patch attached fixes that, by adapting the response to the new way of processing requests / responses to / from the Nodejs server.