Add missing header, now headercheck works again.

(reviewed by bernd)


git-svn-id: svn://svn.iws.uni-stuttgart.de/DUMUX/dumux/trunk@9736 2fb0f335-1f38-0410-981e-8018bf24f1b0

test/boxmodels/2pdfm/2pdfmspatialparams.hh

@@ -24,6 +24,7 @@
 #define DUMUX_TEST_2PDFM_SPATIAL_PARAMETERS_HH
 
 #include <dumux/boxmodels/2pdfm/2pdfmmodel.hh>
+#include <dumux/io/artgridcreator.hh>
 #include <dumux/material/fluidmatrixinteractions/2p/efftoabslaw.hh>
 #include <dumux/material/fluidmatrixinteractions/2p/regularizedbrookscorey.hh>
 #include <dumux/material/spatialparams/boxspatialparams.hh>