Pie chart error if x-axis label not set

[henrypijames]

jquery.svggraph.js line 1461:

graph.xAxis._labels[i])

whereas lines 997, 1087, 1189, 1300:

(axis._labels ? axis._labels[i] : '' + i));

The difference between line 1461 and the other lines means the pie chart is the only one raising an exception when not explicitly initialized with x-axis labels. That can't be right.

But looking at line 1459:

if (graph.xAxis) {

Is there any way for xAxis to be null? Or is line 1461 correct as it is, but line 1459 is supposed to be:

if (graph.xAxis._labels) {