message: zap: replaced by-value call
diff: @@ -10363,7 +10363,7 @@ class basic_json
  */
  template<class ValueType, typename std::enable_if<
  std::is_convertible<basic_json_t, ValueType>::value, int>::type = 0>
  - ValueType value(const typename object_t::key_type& key, ValueType default_value) const
  + ValueType value(const typename object_t::key_type& key, const ValueType& default_value) const
  {
  // at only works for objects
  if (JSON_LIKELY(is_object()))
  @@ -10435,7 +10435,7 @@ class basic_json
  */
  template<class ValueType, typename std::enable_if<
  std::is_convertible<basic_json_t, ValueType>::value, int>::type = 0>
  - ValueType value(const json_pointer& ptr, ValueType default_value) const
  + ValueType value(const json_pointer& ptr, const ValueType& default_value) const
  {
  // at only works for objects
  if (JSON_LIKELY(is_object()))
  