bug in RigidBodyComponents::allocate

[graphitemaster]

Spent awhile tracking this one down, but the component allocation code only copies sizeof(bool) * mNbComponents instead of sizeof(decimal) for mSleepTimes

https://github.com/DanielChappuis/reactphysics3d/blob/master/src/components/RigidBodyComponents.cpp#L101

memcpy(newSleepTimes, mSleepTimes, mNbComponents * sizeof(bool));

[DanielChappuis]

I have pushed a fix for this bug in the master branch.

Thanks a lot for taking the time to investigate this issue. This is very helpful.