title: jqplot and legend option issue
body: <p>I have the following in my code. Having the option</p>
  
  <pre><code> legend: {show:true}  
  </code></pre>
  
  <p>messes up the chart badly. The legend section is so long 
  and there is no chart. 
   I have pasted the image here of how the chart looks : 
  <a href="http://tinypic.com/view.php?pic=2eqgbgy&amp;s=7" rel="nofollow">http://tinypic.com/view.php?pic=2eqgbgy&amp;s=7</a> </p>
  
  <p>It shows fine without the legend option though, but chart is of course without the legend.</p>
  
  <p>In Chrome I see the following exception 
  Uncaught Error: INDEX_SIZE_ERR: DOM Exception 1 </p>
  
  <pre><code>&lt;script type="text/javascript"&gt; 
          line2 = [['Living Expenses',1000], ['Loans',2000], ['Credit 
  Card',500]]; 
      $j(document).ready(function() { 
          $j.jqplot.config.enablePlugins = true; 
          $j.jqplot('piechartdiv', [line2], { 
              title: 'Where is my money going?', 
              seriesDefaults:{renderer:$j.jqplot.PieRenderer, 
  rendererOptions:{sliceMargin:8}}, legend:{show:true} 
          }); 
  }); 
  
  &lt;/script&gt; 
  
  &lt;div style="width: 450px;margin: 0px auto;"&gt; 
      &lt;div id='piechartdiv'&gt;&lt;/div&gt; 
  &lt;/div&gt; 
  </code></pre>
  
  <p>Any help appreciated. </p>