title: Unable to get rowCharts to work with composite charts - specifically the example for comparing selected and unselected overlay charts
body: <p>Having difficulty making this example</p>
  
  <p><a href="https://dc-js.github.io/dc.js/examples/compare-unfiltered.html" rel="nofollow noreferrer">https://dc-js.github.io/dc.js/examples/compare-unfiltered.html</a> </p>
  
  <p>work with rowcharts. 
  JS Fiddle here <a href="https://jsfiddle.net/v3na78c2/2/" rel="nofollow noreferrer">https://jsfiddle.net/v3na78c2/2/</a> </p>
  
  <p>In the jsfiddle it partially works but only the first chart after resetAll is clicked. Other charts don't render at all.</p>
  
  <p>In my environment I get the following exception.</p>
  
  <pre><code>dc.js:8802 Uncaught TypeError: child.rescale is not a function
  at dc.js:8802
  at Array.forEach (&lt;anonymous&gt;)
  at Object.rescale (dc.js:8801)
  at Object._chart.compose (dc.js:9085)
  at metrics.js:1085
  at Array.forEach (&lt;anonymous&gt;)
  at createCharts (metrics.js:1011)
  at Class.&lt;anonymous&gt; (metrics.js:1358)
  at fn (backburner.js:638)
  at invoke (backburner.js:258)
  </code></pre>