Broken custom oauth path after update to 7.x-5.8+100-dev

Hi, i just removed my old patch (https://www.drupal.org/node/2357921 which worked with version 7.x-5.8+72-dev) from profile and installed new version of twitter module (7.x-5.8+100-dev) and my twitter singin stopped working with custom oauth path.
I found where is the problem and I think it does not work now with custom oauth path anywhere.. It always redirects me to the old url twitter/oauth because there is:

twitter.lib.php

public function get_request_token($params = array()) {
...
$oauth_callback = variable_get('twitter_oauth_callback_url', TWITTER_OAUTH_CALLBACK_URL);
...
$params += array('oauth_callback' => url($oauth_callback, array('absolute' => TRUE)));
...

and this is called in twitter_signin.module with $params

function twitter_signin_redirect() {
 ...
$callback_url =  url('twitter/oauth', array('absolute' => TRUE));
$params = array('oauth_callback' => $callback_url);
$token = $twitter->get_request_token($params);
...

the result is that there is always "twitter/oauth" callback. += do not replace oauth_callback key in array .. solution is to change line 107 in twitter_signin.module into

$callback_url =  url(variable_get('twitter_oauth_callback_url', TWITTER_OAUTH_CALLBACK_URL), array('absolute' => TRUE));

or maybe += was bad idea and it needs to be change into array_replace or something like this?