Relationship Permissions User Select - Fatal error on editing control

1.0 Problem/Motivation
Adding as a fixed issue in case anyone else finds this fatal error.

Currently a fatal error occurs when editing a Relationship Permissions user select field.

This has been fixed by https://github.com/colemanw/webform_civicrm/pull/953 however the issues referenced there are only to do with reordering not a fatal error!

2.0 Detailed steps to reproduce (embed screenshots)

On a clean install one can add a new webform - in the CiviCRM tab add two contacts with the second having a relationship with permission user select to the first. Save - attempt to edit this control via the Webform Build screen and get a fatal error.

3.0 Proposed resolution

Already fixed. :)

Have verified that applying the patch from 953 fixes. Note this is not in the dev version provided via composer so you'll need to use an appropriate method (for example composer cweagons patches) to apply the above as a patch.