message: Only stop peeking if at some point we were joined
diff: @@ -259,7 +259,8 @@ module.exports = React.createClass({
  }
  }).done();
  }
  - } else {
  + } else if (room) {
  + // Stop peeking because we have joined this room previously
  MatrixClientPeg.get().stopPeeking();
  this.setState({
  unsentMessageError: this._getUnsentMessageError(room),
  