title: jquery datatable border issue
body: <p>How to show the border for empty cells ? There some columns are blank and no values , so those columns are not displaying the border and its blank.Please see the below screen shot and advise.</p>
  
  <p>One more is there are two lines of border , How to make it one of border ?</p>
  
  <p><strong>HTML</strong></p>
  
  <pre><code>&lt;table border="1"  id="products1" style="width:750px" &gt;   
          &lt;thead&gt;
              &lt;tr&gt;
                  &lt;th&gt;End Date&lt;/th&gt;
                  &lt;th&gt;Modify Date&lt;/th&gt;
                  &lt;th&gt;Comments&lt;/th&gt;
                  &lt;th&gt;By Who&lt;/th&gt;
                 &lt;/tr&gt;
          &lt;/thead&gt;
          &lt;tbody&gt;&lt;/tbody&gt;
      &lt;/table&gt;
  </code></pre>
  
  <p><strong>JS</strong></p>
  
  <pre><code>oTable = $("#products1").dataTable({
         "aaData": newarray, 
         "bProcessing": true,
         "bDeferRender": true,
         "bFilter": true,
         "bRetrieve": true,
         "bPaginate": true,
         "bJQueryUI": true,
         "iDisplayLength": 5,
  
         "sPaginationType": "two_button",
         "sDom": 'T&lt;"clear"&gt;frtip',
          "aoColumns": [{"sWidth": "135px","sClass": "center","bSortable": true},{
              "sWidth": "145px","sClass": "center","bSortable": true},{
              "sWidth": "145px","sClass": "center","bSortable": true},{
              "sWidth": "20px","sClass": "center","bSortable": false}
  
              ],
          "aoColumnDefs": [{ "fnRender": function (o, val) {
              return o.aData[0];
          },
              "sClass": "end date","aTargets": [0]
      }, {
          "fnRender": function (o, val) {
  
              return o.aData[1];
          },
              "sClass": "modified date","aTargets": [1]
      }, {
      "fnRender": function (o, val) {
  
              return o.aData[2];
          },
              "sClass": "comments","aTargets": [2]
      },{
      "fnRender": function (o, val) {
  
              return o.aData[3];
          },
              "sClass": "By who","aTargets": [3]
      }
      ]
  
  });
  </code></pre>