title: cannot read property 'ntr' of undefined
body: <p>I am getting the error "cannot read property 'ntr' of undefined" when i perform mouseover function on a data-table when the data is not present. It works fine when the table is populated.
  The code is as follows: </p>
  
  <pre><code>$('#example_table tbody td').live('mouseover mouseout', function(event) { 
  if (event.type == 'mouseover') {// do something on mouseover 
      console.log('inside mouseover');
      var iPos = oTable.fnGetPosition( this ); // getting error in this line
      if(iPos!=null){
          console.log(iPos);
          var iCol= iPos [1];
      }
  }
  });
  </code></pre>
  
  <p>What check should i do so that i dont get this error</p>
  
  <p>Thanks</p>