ENH: support long indices in UmfpackLU().__init__()
ENH: support long indices in UmfpackLU().__init__()

rc/scikit-umfpack,scikit-umfpack/scikit-umfpack,rc/scikit-umfpack-rc,scikit-umfpack/scikit-umfpack,rc/scikit-umfpack,rc/scikit-umfpack-rc