Leaking memory on sleeping bodies

[grimaldini]

I've been working on Xcode and it has detected that this might still be happening. I see several instances of leaking memory originating at https://github.com/slembcke/Chipmunk2D/blame/edf83e5603c5a0a104996bd816fca6d3facedd6a/src/cpSpaceComponent.c#L101. They seem to be happening when a body comes to rest and sleep time threshold has been set with cpSpaceSetSleepTimeThreshold(space, 1.0f). Then I deallocate the world "reset" (deallocate then recreate the space + bodies) the setup after the body has fallen asleep and wait for them to sleep again, I repeat this until I have enough memory leaks.

I am also attaching a screenshot with the malloc backtrace for the allocation in case it helps.