Refactor: remove references to class World from util and luastack. These are low-level modules that should not reference class World.

luprex/cpp/core/world.hpp

@@ -22,6 +22,11 @@
 #include "source.hpp"
 #include "luasnap.hpp"
 
+enum WorldType {
+    WORLD_TYPE_MASTER = 1,
+    WORLD_TYPE_PREDICTIVE = 2,
+};
+
 class World;
 
 class Tangible : public eng::opnew {
@@ -313,7 +318,7 @@ public:
 
     // Check if the world is authoritative.
     //
-    bool is_authoritative() const { return util::is_authoritative(world_type_); }
+    bool is_authoritative() const { return world_type_ == WORLD_TYPE_MASTER; }
     
     // Get a table showing all outstanding HTTP requests.
     //