Nightly build does not store "special" selected filters via stateSaveCallback

There is a bug in the nightly build of searchPanes - it works with the previous releases. Once again, I cannot provide a test case because there is no working ajax endpoint for retreiving data unter live.datatables.net.

Imagine having a simple table with one column ("location"), displaying the human-readable location name in the table and providing a searchPane with human-readable label but the database id as value.

Your ajax call would return something like:

{
  draw: 1,
  ...
  data: [
    {
      location: 'Munich'
    },
  ...
  searchPanes: {
    options: {
      location: [
        {
          label: 'Munich',
          value: "42",             <---- here is the problem
          count: 1,
          total: 1
        }
        ...
    }
  }
}

When selecting this filter the stateSaveCallback is triggered and data contains the selected filter. Perfect.

But if you reload the page, stateSaveCallback: function(settings, data) is triggered once again but the data does not contain the selected filter anymore:

{
  searchPanes: {
    panes: [
      {
        ...
        selected: []             <---- here is the bug
      }
    ]
  }
}

This only occurs if your searchPanes option (see above) has a different value from the label. If you set the value to "Munich", everything works fine.

Even when storing the state in the dom (without stateSaveCallback), this does not work.