title: highcharts IE8 redraw chart issue
body: <p>I have a problem with highcharts in IE8. I have such simple (for demonstration) code:</p>
  
  <pre><code>$(document).ready(function() {
  chart = new Highcharts.Chart({
      chart: {
          renderTo: 'container',
          type: 'area',
      },
      series: [{
          data: [1,2,3]
      }]
  });
  });
  </code></pre>
  
  <p>that works well.</p>
  
  <p>When I try to redraw a chart</p>
  
  <pre><code>$(document).ready(function() {
  chart = new Highcharts.Chart({
      chart: {
          renderTo: 'container',
          type: 'area',
      },
      series: [{
          data: [1,2,3]
      }]
  });
  chart.redraw();//NEW LINE
  });
  </code></pre>
  
  <p>I get an error 'undefined is null or not an object', file - "http://www.highcharts.com/js/testing.js", line 9495.</p>
  
  <p>The code above does work with any browsers but IE8-</p>
  
  <p>Here - <a href="http://jsfiddle.net/sUXsu/4/" rel="nofollow">http://jsfiddle.net/sUXsu/4/</a> I have the same code that does work in the same browser (IE8).</p>
  
  <p>I use jquery-1.7.2.min.js and jquery-ui-1.8.16.custom.min.js</p>
  
  <p>Thanks for your answers.</p>