[Jbeta] 601L Beta, OpenGL Demo, Drum Surface

[David Mitchell]

When I run the OpenGL Demo, Drum Surface on WinXP, I see a roughly 30 degree pie 
piece shaped section on the right side that does not match smoothly with the 
rest of the surface.

I ran back through earlier beta's and this seems to have been introduced with 
the 601j beta.

David Mitchell
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