added missing header.

dune/fem-dg/test/navierstokes/Makefile.am

 # install these headers 
 nseqdir=$(includedir)/dune/fem-dg/test/navierstokes
 nseq_HEADERS= ns_model.hh problemcreator.hh nswaves.hh \
-ns_model_spec.hh problemtype.hh nssmooth.hh thermodynamics.hh passtraits.hh
+ns_model_spec.hh passtraits.hh problemtype.hh nssmooth.hh thermodynamics.hh passtraits.hh
 
 #USE_OMP=-fopenmp
 #USE_OMP=-DUSE_PTHREADS=1

dune/fem-dg/test/navierstokes/autogeneratedcode.hh

-#if CODEDIM == 1
-#include "./autogeneratedcode/autogeneratedcode_1d.hh"
-#endif
-#if CODEDIM == 2
-#include "./autogeneratedcode/autogeneratedcode_2d.hh"
-#endif
-#if CODEDIM == 3
-#include "./autogeneratedcode/autogeneratedcode_3d.hh"
-#endif