message: Update map_vectorization.cc
diff: @@ -103,7 +103,7 @@ FunctionDef* CreateMapDefunWrapper(const NodeDef& map_node,
  // Set return values to match output names
  string output_prefix = strings::StrCat(map_defun_node->name(), ":output:");
  - for (size_t i = 0; i < static_cast<size_t>(vectorized_func->signature().output_arg_size()); ++i) {
  + for (size_t i = 0, end = vectorized_func->signature().output_arg_size(); i < end; ++i) {
  const auto& output_arg = vectorized_func->signature().output_arg(i);
  (*vectorized_func->mutable_ret())[output_arg.name()] =
  strings::StrCat(output_prefix, i);
  