Changes in sensor behavior in Chipmunk 6

[slembcke]

Ok. I pushed the fix to GitHub. I didn't go and make a test for every border case I could think of, but it was passing all the ones I did implement. I ended up finding one other obscure bug in the process. The performance of cpSpaceRemoveShape() should still be ok, though I did have to add the linear search of the cached arbiter set back. Oh well, at least the implementation is a lot simpler... and correct.

The performance fix added in Chipmunk 6 for adding/removing static shapes didn't need to change at all. So that's still there.

[TomorrowPlusX]

Thanks! I'm in the middle of some tentacle rendering code, but I'll update tomorrow most likely. Thank you again!

[TomorrowPlusX]

Hey, it work beautifully. Thanks for fixing it!

[slembcke]

When I saw this thread had a new post, my first thought was "I really hope he didn't find a new bug in one of the cases I didn't write unit tests for yet!" Heh