[mpfa-l][globaliavolseeds] print warning

dumux/discretization/cellcentered/mpfa/lmethod/globalinteractionvolumeseeds.hh

@@ -57,6 +57,10 @@ public:
                          SeedVector& seeds,
                          BoundarySeedVector& boundarySeeds)
     {
+        // print warning
+        std::cout << "\nWARNING: Note that the mpfa-l method currently only works for unstructured grids"
+                  << "  when the global volume variables and global fv geometry caches are enabled!\n" << std::endl;
+
         seeds.clear();
         boundarySeeds.clear();
         scvfIndexMap.clear();