title: stage.draw() do not fire the actor.draw()
body: <p>In scene2d, the method stage.draw() is supposed to fire the draw method of all actors, but in my case it not fire even a single one.
  This is my code:</p>
  
  <p>Setup:</p>
  
  <pre><code>public IntroScreen(DirectedGame game)
  {
      super(game);
  
      batch = new SpriteBatch();
      camera = new OrthographicCamera(Constants.EDITOR_GUI_WIDTH, Constants.EDITOR_GUI_HEIGHT);
      camera.position.set(0, 0, 0);
      camera.setToOrtho(false);
      camera.update();
  
      stage = new Stage();
      achisoft = new Text("AchiSoft");
      achisoft.setVisible(true);
      achisoft.size(200);
      achisoft.setPosition(50, 50);
      stage.addActor(achisoft);
      Gdx.app.debug("stage","num_actors="+stage.getActors().size);
  
  }
  </code></pre>
  
  <p>Render method:</p>
  
  <pre><code>public void show()
  {
      stage = new Stage();
  }
  
  @Override
  public void render(float deltaTime)
  {
      getInputProcessor();
      Gdx.gl.glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
      Gdx.gl.glClear(GL10.GL_COLOR_BUFFER_BIT);
      stage.act(deltaTime);
      stage.draw();
      //Gdx.app.debug("render","deltaTime="+deltaTime);
  }
  </code></pre>
  
  <p>Actor:</p>
  
  <pre><code>public class Text extends Actor
  {
      BitmapFont fontt;
      String text;
      Texture textur;
  
      public Text(String cad)
      {
          text=cad;
          fontt=Assets.instance.fonts.defaultBig;
          Vector2 res = new Vector2();
      res.set(512, 512);
      Pixmap pixmap = new Pixmap(512, 512, Format.RGBA8888);
      pixmap.setColor( 0, 1, 0, 1f );
      pixmap.fillRectangle(1,1,256,256);
      pixmap.setColor( 1, 0, 0, 1f );
      pixmap.fillRectangle(257,257,256,256);
      textur = new Texture(pixmap);
      pixmap.dispose();
      Gdx.app.debug("texture","entra");
      }
  
      @Override
      public void draw(Batch batch, float parentAlpha)
      {
          fontt.setColor(1, 0, 0, 1); // red
      fontt.draw(batch, text, 20, 20);
      batch.draw(textur,50,50);
      Gdx.app.debug("texture","se pinta");
      }
  
      @Override
      public Actor hit(float x, float y, boolean touchable)
      {
          // TODO Auto-generated method stub
          return super.hit(x, y, touchable);
      }
  }
  </code></pre>
  
  <p>Resize:</p>
  
  <pre><code>@Override
  public void resize(int width, int height)
  {
      stage.setViewport(width, height, false);
      Gdx.app.debug("size",width+ " "+height);
      camera.setToOrtho(false, width, height);
      batch.setProjectionMatrix(camera.combined);
  }
  </code></pre>
  
  <p>The debug string in actor's constructor is printed, but the debug string in the actor's draw is not printer.
  I have test to draw in the render a texture with batch.draw, and works fine. But the actor is never render.</p>