Re-evaluate Cairo's path size limit

[ayr0]

Recently I've been frequently encountering the path size limitation in matplotlib for the Cairo backend. I decided to comment out the relevant check on path size and can report I have not encountered any errors or issues on my linux machine.

I was able to plot several vectors of 5,000,000 points using the Cairo backend without trouble. Can this seemingly arbitrary limit be re-evaluated? It can be a real annoyance when using the Cairo backend.

Tested on:
Matplotlib 1.4.2
Cairo 1.14.0 (with pycairo 1.10.0)
Simply commented out the lines in RendererCairo.draw_path

if len(path.vertices) > 18980:
    raise ValueError("The Cairo backend can not draw paths longer than 18980 points.")

[ayr0]

Looks like this has already been fixed.
I didn't think to check master until now.