code: func (win *Window) SliderInt(min int, val *int, max int, step int) bool {
  	value := float64(*val)
  	ret := win.SliderFloat(float64(min), &value, float64(max), float64(step))
  	*val = int(value)
  	return ret
  }
docs: // Adds a slider with an integer value to win.
  // Returns true when the slider's value changes.