function _columnAutoRender(settings, colIdx) {
		var data = settings.aoData;

		for (var i = 0; i < data.length; i++) {
			if (data[i].nTr) {
				// We have to update the display here since there is no
				// invalidation check for the data
				var display = _fnGetCellData(settings, i, colIdx, 'display');

				data[i].displayData[colIdx] = display;
				_fnWriteCell(data[i].anCells[colIdx], display);

				// No need to update sort / filter data since it has
				// been invalidated and will be re-read with the
				// renderer now applied
			}
		}
	}
Apply an auto detected renderer to data which doesn't yet have
a renderer