compatibility of sankey and no-data-to-display modules

[Shiro00000]

Expected behaviour

if a sankey diagram is displayed, there should not be shown "no data to display"

Actual behaviour

"no data to display" is always displayed, no matter if a sankey diagram is shown or not
if another series is added no-data-to-display works correct. it seems to just ignore the sankey-diagram

Live demo with steps to reproduce

http://jsfiddle.net/L8vs4dsf/

just hang in both modules and insert a sankey-diagram

Affected browser(s)

tested in google chrome

[KacperMadej]

Hi,

Thank you for reporting about the bug.

Internal note: snakey doesn't have dataMin nor dataMax set, so it's recognized by the no-data-to-display as an empty:

highcharts/js/modules/no-data-to-display.src.js

Lines 149 to 151 in 94aac89

	H.Series.prototype.hasData = function () {
	return this.visible && this.dataMax !== undefined && this.dataMin !== undefined; // #3703
	};