Error in  ch03 / 0311 / point.pde

In draw() function there's no if(pts[i] != null) and no endShape().

It's fine in the book, just missing in the the source on github.

If I find any more errors like this would you like me to let you know? and if so, should it be done like this, I'm really not familiar with github except for looking at the code and copy/pasting.
