B: add missing NULL-ptr check to Scene::AddActor
B: add missing NULL-ptr check to Scene::AddActor

weanti/Reaping2,abannerth/Reaping2,weanti/Reaping2,ishtoo/Reaping2,MrPepperoni/Reaping2-1,MrPepperoni/Reaping2-1,HalalUr/Reaping2,HalalUr/Reaping2,Reaping2/Reaping2,abannerth/Reaping2,ishtoo/Reaping2,Reaping2/Reaping2