title: chart js: when all the values passed to data are zeros, nothing is showing
body: <p>I am using chart.js library for showing graphs. I am trying to render a Doughnut graph. When i pass the data, where the values are grater than 0, it is showing the graph as the fiddle link <a href="http://jsfiddle.net/rajeshwarpatlolla/9mby62w4/1/" rel="nofollow noreferrer">http://jsfiddle.net/rajeshwarpatlolla/9mby62w4/1/</a></p>
  
  <p>Data i'm passing in this case is </p>
  
  <pre><code>{ value: 10, color:"#F7464A", highlight: "#FF5A5E", label: "Red" },
  { value: 70, color: "#46BFBD", highlight: "#5AD3D1", label: "Green" },
  { value: 80, color: "#FDB45C", highlight: "#FFC870", label: "Yellow" }
  </code></pre>
  
  <p>My concern is, when the values passed are all zeros, then it is not showing anything, as in this fiddle <a href="http://jsfiddle.net/rajeshwarpatlolla/9mby62w4/3/" rel="nofollow noreferrer">http://jsfiddle.net/rajeshwarpatlolla/9mby62w4/3/</a>. So the user will never know, what is missing in the page. </p>
  
  <p>Data i'm passing in this case is </p>
  
  <pre><code>{ value: 0, color:"#F7464A", highlight: "#FF5A5E", label: "Red" },
  { value: 0, color: "#46BFBD", highlight: "#5AD3D1", label: "Green" },
  { value: 0, color: "#FDB45C", highlight: "#FFC870", label: "Yellow" }
  </code></pre>
  
  <p>I would like to show something like the below image, when all the values are zeros.
  <a href="https://i.stack.imgur.com/DHecG.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/DHecG.png" alt="enter image description here"></a></p>
  
  <p>How can we achieve this, can someone help me on this?</p>