title: can d3js stack layout function v4 support minPointLength from highcharts for zero value?
body: <p>Can D3Js V4 support something similar with minPointLength from highcharts?
  The requirement is: when the bar chart height is 0, we should take consider into this and give a minimized value, say, 1px, for example.
  Currently, zero value will cause the bar chart is 0 and no visual feedback.
  It is not my expectation?</p>
  
  <p>Thanks~!</p>