message: Update parallel_map_dataset_op.cc
diff: @@ -213,7 +213,7 @@ ParallelMapDatasetOp::ParallelMapDatasetOp(OpKernelConstruction* ctx)
  void ParallelMapDatasetOp::MakeDataset(OpKernelContext* ctx, DatasetBase* input,
  DatasetBase** output) {
  - int64 num_parallel_calls;
  + int32 num_parallel_calls;
  OP_REQUIRES_OK(
  ctx, ParseScalarArgument(ctx, kNumParallelCalls, &num_parallel_calls));
  OP_REQUIRES(
  