Check if $update['redirect'] is set

In my case i wanted ogone to do a direct server-to-server request, to update my database, while the rsquest in the browser redirects the user to a given acceptUrl.

The ogone module refered to the redirect page set in the direct server-to-server request.

After studying the diagram found in the ogone documentation (https://secure.ogone.com/ncol/Ogone_e-Com-ADV_EN.pdf) on page 35
i found out that in case of a server-to-server request, if a html response is presented, this response is sent to the client.

On line 299 of ogone.module there is a drupal_goto($update['redirect'])
in my case $update['redirect'] is empty, so a html response with the homepage html is given.

I think you need to check if the $update['redirect'] array is set before drupal goto.

So

drupal_goto($update['redirect']);

should be

if (isset($update['redirect'])) {
   drupal_goto($update['redirect']);
}

if $update['redirect'] does not excist, no html response will be given, and the given acceptUrl will be used