novus/nvd3 — pull request #591 by fabrik42 (2014-06-19 17:16:40+00:00)
Title: Fixes custom x/y value getters for multiChart

The multiChart model provides `x()` and `y()` methods like many other nv models, even with the same implementation. But there are some default settings missing, which causes the methods to throw an error: `Uncaught ReferenceError: getX is not defined`. I added the two missing variable declarations with a default method based on the conventions in other models.