introduced rulegen.cpp which generates strict_tree_rules for arb

floorshapes.cpp

@@ -777,6 +777,7 @@ void geometry_information::generate_floorshapes() {
     for(int i=0; i<n; i++) {
       auto &ms = models[i];
       auto &mh = modelh[i];
+      mh.fieldval = -1;
       for(auto& t: ms.c.move_table) t = nullptr;
       for(auto& t: mh.c.move_table) t = nullptr;
       }