message: Fix chunk size initialization
diff: @@ -798,7 +798,6 @@ static void MultiPartCopy(const Aws::String& source,
  create_multipart_upload_request.WithBucket(bucket_dst).WithKey(object_dst);
  GetS3Client(s3_file);
  - GetTransferManager(Aws::Transfer::TransferDirection::UPLOAD, s3_file);
  auto create_multipart_upload_outcome =
  s3_file->s3_client->CreateMultipartUpload(
  @@ -942,6 +941,7 @@ void CopyFile(const TF_Filesystem* filesystem, const char* src, const char* dst,
  if (TF_GetCode(status) != TF_OK) return;
  auto s3_file = static_cast<S3File*>(filesystem->plugin_filesystem);
  + GetTransferManager(Aws::Transfer::TransferDirection::UPLOAD, s3_file);
  auto chunk_size =
  s3_file->multi_part_chunk_sizes[Aws::Transfer::TransferDirection::UPLOAD];
  size_t num_parts = 1;
  