Forgot to include config.h

dune/common/test/eigenvaluestest.cc

 // -*- tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
 // vi: set et ts=4 sw=2 sts=2:
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 //==============================================================================
 //!
 //! \file shapefunctions.hpp