message: Hopefully fix righhtpanel crash
  The right panel wearns many hats, and only one of those hats comes
  with a room prop, so make sure it's there.
diff: @@ -3,7 +3,7 @@ Copyright 2015, 2016 OpenMarket Ltd
  Copyright 2017 Vector Creations Ltd
  Copyright 2017, 2018 New Vector Ltd
  Copyright 2019 Michael Telatynski <7t3chguy@gmail.com>
  -Copyright 2019 The Matrix.org Foundation C.I.C.
  +Copyright 2019, 2020 The Matrix.org Foundation C.I.C.
  Licensed under the Apache License, Version 2.0 (the "License");
  you may not use this file except in compliance with the License.
  @@ -162,7 +162,7 @@ export default class RightPanel extends React.Component {
  }
  onRoomStateMember(ev, state, member) {
  - if (member.roomId !== this.props.room.roomId) {
  + if (!this.props.room || member.roomId !== this.props.room.roomId) {
  return;
  }
  // redraw the badge on the membership list
  