add new screentype to prevent gc from unloading replays at eval

src/RageTextureManager.cpp

@@ -67,7 +67,8 @@ RageTextureManager::Update(float fDeltaTime)
 	static RageTimer garbageCollector;
 	if (garbageCollector.PeekDeltaTime() >= 30.0f) {
 		if ((SCREENMAN != nullptr) && (SCREENMAN->GetTopScreen() != nullptr) &&
-			SCREENMAN->GetTopScreen()->GetScreenType() != gameplay) {
+			SCREENMAN->GetTopScreen()->GetScreenType() != gameplay &&
+			SCREENMAN->GetTopScreen()->GetScreenType() != evaluation) {
 			DoDelayedDelete();
 			garbageCollector.Touch();
 		}

src/Screen.cpp

@@ -19,6 +19,7 @@ static const char* ScreenTypeNames[] = {
 	"Attract",
 	"GameMenu",
 	"Gameplay",
+	"Evaluation",
 	"SystemMenu",
 };
 XToString(ScreenType);

src/Screen.h

@@ -41,6 +41,7 @@ enum ScreenType
 	game_menu,   /**< The menu screens, where options can be set before playing.
 				  */
 	gameplay,	/**< The gameplay screen, where the actual game takes place. */
+	evaluation,
 	system_menu, /**< The system/operator menu, where special options are set.
 				  */
 	NUM_ScreenType, /**< The number of screen types. */

src/ScreenEvaluation.h

@@ -54,7 +54,7 @@ class ScreenEvaluation : public ScreenWithMenuElements
 	void Init() override;
 	bool Input(const InputEventPlus& input) override;
 	void HandleScreenMessage(ScreenMessage SM) override;
-
+	ScreenType GetScreenType() const override { return evaluation; }
 	bool MenuBack(const InputEventPlus& input) override;
 	bool MenuStart(const InputEventPlus& input) override;
 	void PushSelf(lua_State* L) override;