replace lua Random implementation with usertype

src/logic/scripting/lua/lua_util.hpp

@@ -275,6 +275,15 @@ namespace lua {
         }
         return nullptr;
     }
+
+    template <class T>
+    inline T& require_userdata(lua::State* L, int idx) {
+        if (void* rawptr = lua_touserdata(L, idx)) {
+            return *static_cast<T*>(rawptr);
+        }
+        throw std::runtime_error("invalid 'self' value");
+    }
+    
     template <class T, typename... Args>
     inline int newuserdata(lua::State* L, Args&&... args) {
         const auto& found = usertypeNames.find(typeid(T));