message: Declare levelDB file size using uint64_t
diff: @@ -13,6 +13,7 @@ See the License for the specific language governing permissions and
  limitations under the License.
  ==============================================================================*/
  +#include <cstdint>
  #include <vector>
  #include "absl/memory/memory.h" // from @com_google_absl
  @@ -44,7 +45,7 @@ PYBIND11_MODULE(leveldb_testing_utils, m) {
  "Failed to create RandomAccessFile at %s", fname));
  }
  auto unique_file = absl::WrapUnique(file);
  - size_t file_size;
  + uint64_t file_size;
  if (!env->GetFileSize(fname, &file_size).ok()) {
  return absl::InternalError(
  absl::StrFormat("Failed to get file size at %s", fname));
  