SimplicialCholesky: avoid multiple twisting of the same matrix when calling compute()
SimplicialCholesky: avoid multiple twisting of the same matrix when calling compute()

pthulhu/eigen,pthulhu/eigen,cjntaylor/eigen,pthulhu/eigen,pthulhu/eigen,cjntaylor/eigen,cjntaylor/eigen,pthulhu/eigen,cjntaylor/eigen