Cleanup

src/device.cpp

@@ -165,9 +165,9 @@ void Device::update()
 	_lua_environment->clear_temporaries();
 }
 
-void Device::render_world(World* world, Camera* camera)
+void Device::render_world(World& world, Camera* camera)
 {
-	world->render(camera);
+	world.render(camera);
 }
 
 World* Device::create_world()

src/device.h

@@ -81,7 +81,7 @@ struct Device
 	void update();
 
 	/// Renders the given @a world from the point of view of @a camera.
-	void render_world(World* world, Camera* camera);
+	void render_world(World& world, Camera* camera);
 
 	/// Creates a new world.
 	World* create_world();

src/lua/lua_device.cpp

@@ -78,7 +78,7 @@ static int device_destroy_world(lua_State* L)
 static int device_render_world(lua_State* L)
 {
 	LuaStack stack(L);
-	device()->render_world(stack.get_world(1), stack.get_camera(2));
+	device()->render_world(*stack.get_world(1), stack.get_camera(2));
 	return 0;
 }