Errors when combining multiple axes with series.visible = false

[Nickesh]

Errors occur in FireFox, Safari and Chrome (not in Opera and IEs) when you set series.visible to false, but only when you have at least two series binded to different axes.

Reported at: http://highslide.com/forum/viewtopic.php?f=9&t=7209
Demo at: http://jsfiddle.net/ekMNR/

[TorsteinHonsi]

point.plotY becomes NaN for the failing series. This causes errors in FF when trying to draw circles, and in Chrome when trying to draw the graph.

This helps in FF:
if (plotY !== UNDEFINED && !isNaN(plotY)) {

[TorsteinHonsi]

The same errors appear with this minimal demo: http://jsfiddle.net/ekMNR/1/

[TorsteinHonsi]

Fixed path calculation errors for hidden series caused by the axis not having min and max. Closed by ff353d8.