title: dc.js Row Chart values correct but bars all same length
body: <p>i'm trying to build a row Chart with dc.js. 
  The keys / values for my dimension and group are correct (and displayed correctly in label and tooltip),
  but the row bars are not rendered to their corresponding length, example :</p>
  
  <pre><code>var qyChart  = dc.rowChart("#top-ten") ;
  qyChart
  .dimension(qyDim)
  .group(qyT)     
  .x(d3.scale.linear().domain([0,100]))
  .label(function(d){
          return d.key + " : " + d.value + " - " +(d.value / ndx.groupAll().reduceCount().value() * 100).toFixed(2) + "%";
      })
  .elasticX(true) 
  .ordering(function(d){ return -d.value; })
  .rowsCap(10)
  .colors(qyColors)
  ; 
  </code></pre>
  
  <p>Result :
  <img src="https://i.stack.imgur.com/dlnad.png" alt="Resulting Graph"></p>