Latest commit 890c3f8 Jan 15, 2017 @mojoaxel mojoaxel committed with yotamberk fix(graph2d): fix #2500 for graph2d (#2581)
* fix(graph2d): fix #2500 for graph2d; improves #2580

* fix(DataSet): make sure the right id-type is used internaly

This fixes a fixed strange string-number conversion issue.
It can happen that id "0" !== 0 what causes #2580.

fixes #2580