message: Fix TimelineReset handling when no room associated
diff: @@ -241,8 +241,8 @@ export default class EventIndex extends EventEmitter {
  * Listens for timeline resets that are caused by a limited timeline to
  * re-add checkpoints for rooms that need to be crawled again.
  */
  - private onTimelineReset = async (room: Room, timelineSet: EventTimelineSet, resetAllTimelines: boolean) => {
  - if (room === null) return;
  + private onTimelineReset = async (room: Room | undefined) => {
  + if (!room) return;
  if (!MatrixClientPeg.get().isRoomEncrypted(room.roomId)) return;
  logger.log("EventIndex: Adding a checkpoint because of a limited timeline",
  