TClonesArray::Expand* avoid nullptr dereference if object is invalid
TClonesArray::Expand* avoid nullptr dereference if object is invalid

karies/root,karies/root,karies/root,karies/root,olifre/root,root-mirror/root,root-mirror/root,root-mirror/root,olifre/root,olifre/root,olifre/root,olifre/root,root-mirror/root,root-mirror/root,root-mirror/root,karies/root,olifre/root,olifre/root,root-mirror/root,root-mirror/root,root-mirror/root,olifre/root,karies/root,olifre/root,karies/root,root-mirror/root,karies/root,karies/root,karies/root,root-mirror/root,olifre/root,olifre/root,karies/root