message: fix clang format plus implicit cast error.
diff: @@ -385,9 +385,8 @@ class Reference {
  Reference(const uint8_t *data, uint8_t parent_width, uint8_t packed_type)
  : data_(data),
  parent_width_(parent_width),
  - byte_width_(1 << (packed_type & 3)),
  - type_(static_cast<Type>(packed_type >> 2)) {
  - }
  + byte_width_(static_cast<uint8_t>(1 << (packed_type & 3))),
  + type_(static_cast<Type>(packed_type >> 2)) {}
  Type GetType() const { return type_; }
  