barChart failing in v2.1.5-SNAPSHOT but wokring in v2.1.4-SNAPSHOT

[GoogleCodeExporter]

What steps will reproduce the problem?

Try to render a barGraph, and it will fail. A pieChart is still working.
The barGraph was working with a previous version of elycharts.

This is my template:

$.elycharts.templates['call_status_hours'] = {
    type: "line",
    margins: [10, 40, 40, 30],
    defaultSeries: {
      plotProps : {
          stroke : "none"
      },
      highlight: {
          newProps: {
          r: 8,
          opacity: 1
        },
        overlayProps: {
          fill: "white",
          opacity: 0.2
        }
      },
      tooltip: {
          height: 100,
          width: 120,
          frameProps: {
              opacity: 0.95,
              stroke: "#ccc"
          }
      }
    },
    series: series,
    defaultAxis: {
      labels: true
    },
    axis: {
      x: {
        labelsRotate: 45,
        labelsProps: {
          font: "11px Verdana"
        }
      }
    },
    features: {
      grid: {
        draw: true,
        forceBorder: true,
        ny: 5 // TODO: this is the parameter to set dynamically
      }
    },
    barMargins: 5
  };

This is my chart:

  $("#chart_call_status_hours")
      .chart({
      template: "call_status_hours",
      tooltips: tooltips,
      values: values,
      labels: labels,
      defaultSeries: {
        type: "bar",
        stacked: true
      }
  }).animate({opacity:1},1000);

The bar graph is not rendering, because there is an error: function colorize is 
failing when walking expandKeys:

  /**
   * Given an expandKey as array of array it sets the color to the nested tree unless it is already defined.
   * So [ [ 'parent', 'child' ], [ 'item' ] ] will try to put color in props.parent.child and props.item unless
   * they already exists.
   */
  colorize : function(env, props, expandKeys, color) {
    if (color) {
          console.log('expandKeys=%o',expandKeys);
      for (k in expandKeys) {
            console.log('doing k=%o -> expandKeys[k]=%o', k, expandKeys[k]);
        var p = props;
        var i = 0;
        for (i = 0; i < expandKeys[k].length - 1; i++) {
          if (!p[expandKeys[k][i]]) p[expandKeys[k][i]] = {};
          p = p[expandKeys[k][i]];
        }
        if (!p[expandKeys[k][expandKeys[k].length-1]]) p[expandKeys[k][expandKeys[k].length-1]] = color;
      }
    }
  },

It is failing because it is trying to walk key "firstObject":

doing k="firstObject" -> expandKeys[k]=undefined
Uncaught TypeError: Cannot read property 'length' of undefined

My data is:
expandKeys : 
0: Array[2]
0: "plotProps"
1: "stroke"
length: 2
__proto__: Array[0]
1: Array[2]
0: "plotProps"
1: "fill"
length: 2
__proto__: Array[0]
length: 2
__proto__: Array[0]

It seems to be walking the proto.

What is the expected output? What do you see instead?

What version of the product are you using? On what operating system?
v2.1.5-SNAPSHOT is wrong. v2.1.4-SNAPSHOT is working fine.

Please provide any additional information below.

Original issue reported on code.google.com by gonva...@gmail.com on 17 Feb 2014 at 8:10