title: postData for subgrid in jqgrid not working?
body: <p>Hi I have a jqgrid with a subgrid which calls into a servlet.
  I am sending some data to the servlet using POST but the same data doesn't get sent when the call for the subgrid is made. This is my JS:</p>
  
  <pre><code>$("#testsTable").jqGrid({
    mtype: "POST",
    url: "GetCurrentStatusServlet",
    postData: {buildPath :"C:\\Test\\01"},
    datatype: "xml",
       colNames:['TestCase Name', 'Last Update', 'Status'],
       colModel:[
        {name:'name',index:'name', width:90},
        {name:'lastupdate',index:'lastupdate', width:100},
        {name:'status',index:'status', width:80, align:"right"}   
       ],
       rowNum:10,
       autowidth: true,
       rowList:[10,20,30],
       pager: $('#pager1'),
       sortname: 'id',
       viewrecords: true,
       multiselect: true,
    caption: "Tests",
       sortorder: "desc",
       subGrid: true,
       subGridUrl : "GetCurrentStatusServlet",
       subGridModel: [ {
         name:  ['TestCase Name', 'Last Update', 'Status'],
         width : [100, 200, 80],
         params: ['name']}]
   }).navGrid('#pager1',{edit:false,add:false,del:false}); 
  </code></pre>
  
  <p>So how can I postData also to the subgrid servlet? is there any way to specify subgridPostData?
  Thanks.</p>