Shared Views - PDF - item_thumb not working

Hi, 

The user with whom content was shared cannot see images. The problem is with the access function.

`            if ($pdfaccess && $pdfforuserid > 0) {
                $userid = $pdfforuserid;
                $myuserid = $pdfforuserid;
            } else {
                $userid = clean_param($hash[0], PARAM_INT);
                $myuserid = $USER->id;
            }`

