demo memory leak fix

demo/inc/states/game/game_state.hpp

@@ -0,0 +1,40 @@
+/*
+# ______       ____   ___
+#   |     \/   ____| |___|
+#   |     |   |   \  |   |
+#-----------------------------------------------------------------------
+# Copyright 2022, tyra - https://github.com/h4570/tyra
+# Licenced under Apache License 2.0
+# Sandro Sobczyński <sandro.sobczynski@gmail.com>
+*/
+
+#pragma once
+
+#include "state/state.hpp"
+#include "state/global_state_type.hpp"
+
+namespace Demo {
+
+class GameState : public State<GlobalStateType> {
+ public:
+  GameState(Engine* t_engine);
+  ~GameState();
+
+  const GlobalStateType& getState() const { return state; }
+
+  const bool& wantFinish() const { return _wantFinish; };
+
+  void onStart();
+
+  void update();
+
+  /** @return Next game state */
+  GlobalStateType onFinish();
+
+ private:
+  GlobalStateType state;
+  bool _wantFinish;
+  bool initialized;
+};
+
+}  // namespace Demo