Enabling zoom causing errors on double click of the line chart

Hi,

I'm trying to use zoom functionality with the line chart.

Following my chart configuration.

```
{
axis: {
x: {
tick: {
format: date => {
return this.formateX(date as Date);
},
multiline: false
},
type: "timeseries"
},
y: {
tick: {
format: d => (+d.toFixed(2)) + "h"
}
}
},
bindto: element,
data: {
json: graphData,
type: "line"
},
legend: {
show: false
},
point: {
show: false
},
zoom: {
enabled: true
}
}
```
I'm able to generate line chart with the above configuration, but not able to zoom the chart by double click on any point of the line.

Console says following error:


**Updated:**
JSFiddle: https://jsfiddle.net/q28bo33g/

* **C3 version**: 0.4.11
* **D3 version**: 3.5.7
* **Browser**: Chrome 61.0
* **OS**: MAC