Fixed small problem for seq compile.

AMDiS/src/DOFMatrix.cc

@@ -519,9 +519,11 @@ namespace AMDiS {
   }
 
 
+#ifdef HAVE_PARALLEL_DOMAIN_AMDIS
   void DOFMatrix::setDofMap(FeSpaceDofMap& m)
   {
     dofMap = &m; 
   }
+#endif
 
 }