How to fix bundle option selection list access denied (patch 6788)

[achadelle]

Hi,

The current patch 6788 forgot to update a file to allow users without full permissions, to have the list of products in the bundle option selection part (access denied).

To fix, just this new function in app/code/core/Mage/Bundle/controllers/Adminhtml/Bundle/SelectionController.php

protected function _isAllowed()
{
    return true;
}