fix: fleeing entities must have a CharacterMovement component #85
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Problem: An entity with a death animation may already be stripped off its CharacterMovementComponent when receiving additional damage. This may cause an NPE when accessing the component without guarding check.
Solution: Require the CharacterMovementComponent in the event handler to ensure that it is present. Skip the event handler if the component is not present, as fleeing without character movement does make much sense anyways.