message: Fix to default argument
diff: namespace oatpp { namespace web { namespace client {
  -RequestExecutor::RequestExecutionError::RequestExecutionError(v_int32 errorCode, const char* message, v_int32 readErrorCode = 0)
  +RequestExecutor::RequestExecutionError::RequestExecutionError(v_int32 errorCode, const char* message, v_int32 readErrorCode)
  : std::runtime_error(message)
  , m_errorCode(errorCode)
  , m_message(message)
  