bug with creating new control points in demo

[bennlich]

I can delete control points by double-clicking them, but I can't create new ones. I get this error:

Uncaught TypeError: Failed to execute 'moveTo' on 'CanvasRenderingContext2D': 2 arguments required, but only 1 present.

Did ctx.moveTo() used to accept one array instead of two separate x and y parameters?

I'm running Chrome 32.0.1700.68.