GRIM: Add return to launcher support.

Also fix a memory leak, and reinitialize a global var in lua

backends/graphics/surfacesdl/surfacesdl-graphics.cpp

@@ -75,6 +75,8 @@ SurfaceSdlGraphicsManager::~SurfaceSdlGraphicsManager() {
 	// Unregister the event observer
 	if (g_system->getEventManager()->getEventDispatcher() != NULL)
 		g_system->getEventManager()->getEventDispatcher()->unregisterObserver(this);
+
+	closeOverlay();
 }
 
 void SurfaceSdlGraphicsManager::initEventObserver() {

engines/grim/grim.cpp

@@ -38,6 +38,7 @@
 #endif
 
 #include "common/archive.h"
+#include "common/debug-channels.h"
 #include "common/events.h"
 #include "common/file.h"
 #include "common/fs.h"
@@ -193,6 +194,8 @@ GrimEngine::~GrimEngine() {
 	delete g_driver;
 	g_driver = NULL;
 	delete _iris;
+
+	DebugMan.clearAllDebugChannels();
 }
 
 void GrimEngine::clearPools() {
@@ -583,6 +586,9 @@ void GrimEngine::mainLoop() {
 			resetShortFrame = !resetShortFrame;
 		}
 
+		if (shouldQuit())
+			return;
+
 		if (_savegameLoadRequest) {
 			savegameRestore();
 		}
@@ -647,9 +653,6 @@ void GrimEngine::mainLoop() {
 			if (type == Common::EVENT_KEYDOWN || type == Common::EVENT_KEYUP) {
 				handleControls(type, event.kbd.keycode, event.kbd.flags, event.kbd.ascii);
 			}
-			// Check for "Hard" quit"
-			if (type == Common::EVENT_QUIT)
-				return;
 			if (type == Common::EVENT_SCREEN_CHANGED)
 				_refreshDrawNeeded = true;
 
@@ -1054,4 +1057,8 @@ void GrimEngine::clearEventQueue() {
 	}
 }
 
+bool GrimEngine::hasFeature(EngineFeature f) const {
+	return f == kSupportsRTL;
+}
+
 } // end of namespace Grim

engines/grim/grim.h

@@ -152,6 +152,9 @@ public:
 
 	void changeHardwareState();
 
+	// Engine APIs
+	bool hasFeature(EngineFeature f) const;
+
 	Common::StringArray _listFiles;
 	Common::StringArray::const_iterator _listFilesIter;
 

engines/grim/lua/lauxlib.cpp

@@ -82,6 +82,7 @@ void lua_removelibslists() {
 		luaM_free(list);
 		list = nextList;
 	}
+	list_of_libs = NULL;
 }
 
 void luaL_openlib(luaL_reg *l, int32 n) {