title: x-axis not updating for dc.js filter
body: <p>Fiddle: <a href="http://jsfiddle.net/tvinci/J9ghN/" rel="nofollow">http://jsfiddle.net/tvinci/J9ghN/</a></p>
  
  <p>I've created a pie chart broken down by year and I've set the min and max range for the line chart based off the dimension. However, when I select a year, the range does not update. Am I doing something wrong?</p>
  
  <pre><code>var yearRingChart = dc.pieChart("#chart-ring-year");
  var tpslineChart = dc.lineChart("#chart-tps");
  
  var data2 = [
  {date: "10/01/2012", hits: 1, tps: 100, http_status:200},
  {date: "10/01/2012", hits: 1, tps: 90, http_status:302},
  {date: "01/02/2013", hits: 1, tps: 100, http_status:200},
  {date: "01/02/2013", hits: 1, tps: 10, http_status:302},
  {date: "01/03/2013", hits: 0, tps: 300, http_status:200},
  {date: "01/03/2013", hits: 1, tps: 10, http_status:302},
  {date: "01/04/2013", hits: 1, tps: 90, http_status:200},
  {date: "01/04/2013", hits: 1, tps: 0, http_status:302},
  ];
  
  var ndx2 = crossfilter(data2);
  // normalize/parse data
  var parseDate = d3.time.format("%m/%d/%Y").parse;
  
  data2.forEach(function(d) {
  d.date = parseDate(d.date);
  d.Year=d.date.getFullYear();
  });
  
  var yearDim = ndx2.dimension(function(d) {return +d.Year;});
  var tpsDim = ndx2.dimension(function(d) {return d.date;});
  
  var tps_total = yearDim.group().reduceSum(function(d) {return d.tps;});
  var tps_graph = tpsDim.group().reduceSum(function(d) {return d.tps;});
  
  var minDate = tpsDim.bottom(1)[0].date;
  var maxDate = tpsDim.top(1)[0].date;
  
  yearRingChart
  .width(200).height(200)
  .dimension(yearDim)
  .group(tps_total)
  .innerRadius(50);
  
  tpslineChart
  .width(500).height(200)
  .dimension(tpsDim)
  .group(tps_graph)
  .brushOn(false)
  .x(d3.time.scale().domain([minDate,maxDate]))
  .xUnits(d3.time.day)
  .yAxisLabel("TPS")
  .elasticY(true)
  .margins({ top: 10, left: 50, right: 10, bottom: 50 })
  //.renderlet(function (chart) {chart.selectAll("g.x text").attr('dx', '-30').attr('transform',     "rotate(-90)");})
  ;
  
  dc.renderAll();
  </code></pre>