message: Check for valid roomId before renering manageIntegsButton.
diff: @@ -323,14 +323,18 @@ module.exports = React.createClass({
  }
  let rightRow;
  + let manageIntegsButton;
  + if(this.props.room && this.props.room.roomId) {
  + manageIntegsButton = <ManageIntegsButton
  + roomId={this.props.room.roomId}
  + />;
  + }
  if (!this.props.editing) {
  rightRow =
  <div className="mx_RoomHeader_rightRow">
  { settingsButton }
  - <ManageIntegsButton
  - roomId={this.props.room.roomId}
  - />
  + { manageIntegsButton }
  { forgetButton }
  { searchButton }
  { rightPanelButtons }
  