message: Workaround for soft-crash with calls on startup
  Fixes
diff: @@ -90,6 +90,13 @@ module.exports = createReactClass({
  }
  } else {
  call = CallHandler.getAnyActiveCall();
  + // Ignore calls if we can't get the room associated with them.
  + // I think the underlying problem is that the js-sdk sends events
  + // for calls before it has made the rooms available in the store,
  + // although this isn't confirmed.
  + if (MatrixClientPeg.get().getRoom(call.roomId) === null) {
  + call = null;
  + }
  this.setState({ call: call });
  }
  