added comment

dune/alugrid/impl/serial/gitter_mgb.cc

@@ -806,6 +806,7 @@ namespace ALUGrid
 
   void initialize () 
   {
+    // careful with changes here, you'll get what you deserve
     const char str
       [ 117 ] = {97,120,126,42,107,125,112,44,-127,-128,118,124,117,47,83,101,94,86,62,83,94,104,90,-122,125,121,65,54,-122,-125,124,121,-117,126,57,126,-119,-119,66,-112,60,-125,-116,-112,-123,-124,-109,64,-108,-112,65,-123,-117,-105,-120,94,46,105,-118,-118,-108,-116,-103,84,72,116,-107,-103,-113,-111,-106,-101,-98,-101,89,78,124,-98,-101,-92,-107,107,81,-122,-102,-104,83,120,-119,-125,122,99,119,-125,-116,127,-86,-94,-99,90,-121,-86,-97,-79,-88,-94,105,94,112,111,112,116,110,75,75};
     MakrogitterBuilder s;