More 2D bugfixes

I worked on a patch to fix a bug in the Pisces renderer:

http://hg.openjdk.java.net/jdk7/2d/jdk/rev/fb03586d68b6

http://bugs.openjdk.java.net/show_bug.cgi?id=100030

The bug was that a circle was rendered like a 'C' shape, that is, the right most edge of the circle wasn't rendered properly. It turned out that there was a off-by-one error.

And there are a few more bugfixes in progress:

https://bugs.openjdk.java.net/show_bug.cgi?id=100035

https://bugs.openjdk.java.net/show_bug.cgi?id=100031

https://bugs.openjdk.java.net/show_bug.cgi?id=100088

https://bugs.openjdk.java.net/show_bug.cgi?id=100089

Thanks to Jennifer Godinez.

[Note: at least the 100031 patch has been checked into OpenJDK.]