title: highchart datalabel one value is missing in label
body: <p>i have highchart graph api similar to pasted fiddle link, the problem<br>
      is number is missing in few stacked column( example in fiddle <strong>decission</strong> line one label value is missing) could anyone help on this why<br>
      this is happening </p>
  
  <pre><code>$(function () {
  $('#container').highcharts({
      chart: {
          type: 'column',
          inverted:true,
          height: 200
      },
      title: {
          text: 'Stacked column chart'
      },
      xAxis: {
          categories: ['Pending', 'Further', 'Decision']
      },
      yAxis: {
          min: 0,
          //max:100,
          title: {
              text: 'Total fruit consumption'
          },
          stackLabels: {
              enabled: true,
              style: {
                  fontWeight: 'bold',
                  color: (Highcharts.theme &amp;&amp; Highcharts.theme.textColor) || 'gray'
              }
          }
      },
      legend: {
          align: 'center',
          x: -30,
          verticalAlign: 'top',
          y: 25,
          floating: false,
          backgroundColor: (Highcharts.theme &amp;&amp; Highcharts.theme.background2) || 'white',
          borderColor: '#CCC',
          borderWidth: 1,
          shadow: false
      },
      tooltip: {
          headerFormat: '&lt;b&gt;{point.x}&lt;/b&gt;&lt;br/&gt;',
          pointFormat: '{series.name}: {point.y}&lt;br/&gt;Total: {point.stackTotal}'
      },
      plotOptions: {
          column: {
              stacking: 'normal',
              dataLabels: {
                  enabled: true,
                  crop:false,
                  color: (Highcharts.theme &amp;&amp; Highcharts.theme.dataLabelsColor) || 'white',
                  style: {
                      textShadow: '0 0 3px black'
                  }
              }
          }
      },
      series: [{
          data:[3, 2, 1], 
          name:'Today'
      }, {
          data:[2, 2, 19], 
          name:'1 Day'
      }, {
          data:[14, 2, 22], 
          name:'2 Days'
      },{
          data:[6, 2, 18], 
          name:'3 Days'
      },{
          data:[10, 2, 537], 
          name:'&gt;3 Days'
      }]
  });
  </code></pre>
  
  <p>});
  <a href="http://jsfiddle.net/g6wsd1hm/" rel="nofollow">http://jsfiddle.net/g6wsd1hm/</a></p>