Include <boost/cstdint.hpp> for uint64_t (#1168)
Include <boost/cstdint.hpp> for uint64_t (#1168)

One more occurrence of `uint64_t` that requires `<boost/cstdint.hpp>` due to the lack of `<stdint.h>` in Visual Studio 2008.
rdkit/rdkit,rvianello/rdkit,ptosco/rdkit,rdkit/rdkit,greglandrum/rdkit,ptosco/rdkit,bp-kelley/rdkit,bp-kelley/rdkit,rvianello/rdkit,greglandrum/rdkit,rdkit/rdkit,ptosco/rdkit,rvianello/rdkit,bp-kelley/rdkit,ptosco/rdkit,rdkit/rdkit,greglandrum/rdkit,bp-kelley/rdkit,bp-kelley/rdkit,ptosco/rdkit,rvianello/rdkit,rvianello/rdkit,rvianello/rdkit,greglandrum/rdkit,bp-kelley/rdkit,ptosco/rdkit,rdkit/rdkit,rdkit/rdkit,greglandrum/rdkit,bp-kelley/rdkit,ptosco/rdkit,rvianello/rdkit,greglandrum/rdkit,greglandrum/rdkit,ptosco/rdkit,rdkit/rdkit,rdkit/rdkit,bp-kelley/rdkit,rvianello/rdkit,greglandrum/rdkit