message: Fix a bug where vector::reserve was being called on config.sparse instead of config.ragged.
diff: @@ -222,7 +222,7 @@ class ParseExampleOp : public OpKernel {
  for (int d = 0; d < attrs_.num_sparse; ++d) {
  config.sparse.emplace_back(sparse_keys_t[d], attrs_.sparse_types[d]);
  }
  - config.sparse.reserve(attrs_.num_ragged);
  + config.ragged.reserve(attrs_.num_ragged);
  for (int d = 0; d < attrs_.num_ragged; ++d) {
  config.ragged.emplace_back(ragged_keys_t[d], attrs_.ragged_value_types[d],
  attrs_.ragged_split_types[d]);
  