NaN

value is displaying NaN when I'm trying to reset to zero before I recalculate again...
```

//setup
; (function () {
var _originalInitFill = $.circleProgress.defaults.initFill;

// circle progress plugin to get sectors
$.circleProgress.defaults.initFill = function () {
_originalInitFill.apply(this, arguments);

if (this.fill.sectors) {
var s = this.size,
r = s / 2,
sa = this.startAngle;

var bg = $('')[0];
bg.width = s;
bg.height = s;

var lastValue = 0,
ctx = bg.getContext('2d');

for (var i = 0; i < this.fill.sectors.length; i++) {
var sector = this.fill.sectors[i],
currentColor = sector[0],
currentValue = sector[1];

ctx.beginPath();
ctx.moveTo(r, r);
ctx.arc(r, r, r, sa + 2 * lastValue * Math.PI, sa + 2 * currentValue * Math.PI);
ctx.moveTo(r, r);
ctx.fillStyle = currentColor;
ctx.fill();

lastValue = currentValue;
}

this.arcFill = this.ctx.createPattern(bg, 'no-repeat');
}
};
})();

//initial load
$("#circle").circleProgress({
value: (v1 + v2 )/v3,
emptyFill: "#D9D9D'',
size: 148,
startAngle: -Math.PI / 4 * 2,
fill: {
sectors: [
["#0072a3",v1 / v3],
["#f2b72b",(v1 + v2 )/v3]

]
}
,
thickness: 12
});

//reset
$("#circle").circleProgress({ value: 0.0 });
```

I also tried value: 0, still displays NaN. Honestly what I really want it display is " -- ", but i'll take 0

Start with the circleProgress initialization and the later reset call shown in the report, reproducing the NaN result with the same v1, v2, and v3 inputs. Trace the plugin's zero-value handling and verify that resetting produces a numeric zero or the requested "--" display.

Written by the indexing model from the issue text.