demo memory leak fix

demo/inc/states/intro/intro_state.hpp

@@ -36,6 +36,7 @@ class IntroState : public State<GlobalStateType> {
  private:
   GlobalStateType state;
   bool _wantFinish;
+  bool initialized;
 
   StateManager<IntroStateType> stateManager;
 };

demo/inc/states/intro/states/intro_press_key_state.hpp

@@ -33,11 +33,11 @@ class IntroPressKeyState : public State<IntroStateType> {
 
   void onStart();
 
-  void update();
-
   /** @return Next game state */
   IntroStateType onFinish();
 
+  void update();
+
  private:
   void renderFiller();
   void updateMap();