refactored shvid_full and wall_offset as virtual functions

kite.cpp

@@ -338,6 +338,13 @@ struct hrmap_kite : hrmap {
       }
     return gm * where;
     }
+
+  virtual int wall_offset(cell *c) {
+    if(WDIM == 3)
+      return kite::getshape(c->master) == kite::pKite ? 10 : 0;
+    else
+      return hrmap::wall_offset(c);
+    }
   
   hrmap_kite() {
     make_graphrules();