message: Copied render from nav react native Scene
diff: @@ -23,11 +23,12 @@ class Scene extends React.Component<SceneProps & {navigationEvent: NavigationEve
  }
  render() {
  var {navigationEvent} = this.state;
  - if (!navigationEvent) return null;
  - var {state, data} = navigationEvent.stateNavigator.stateContext;
  + var {crumb, navigationEvent: {stateNavigator}} = this.props;
  + var {crumbs, nextCrumb} = stateNavigator.stateContext;
  + var {state, data} = (crumb < crumbs.length) ? crumbs[crumb] : nextCrumb;
  return (
  <NavigationContext.Provider value={navigationEvent}>
  - {this.props.renderScene(state, data)}
  + {navigationEvent && this.props.renderScene(state, data)}
  </NavigationContext.Provider>
  );
  }
  