Blender Git Loki

Cleanup of BGE code CcdPhysicsEnvironment::CallbackTriggers()

Refactored some code to be easier to read. Semantically the code is
identical.

- Some conditions were negated to be able to return/continue early,
rather than having the majority of the code inside an if-body.
- Conditions were simplified (!(a == b)) turned into (a != b);
repeated conditions calculated only once.
- Unnecessary variables and one unnecessary condition were
eliminated.

Reviewers: campbellbarton, lordloki

Reviewed By: lordloki

Projects: #game_physics

Differential Revision: https://developer.blender.org/D954