WiiU: Do not crash the system when using the "Exit" menu item

src/player.cpp

@@ -31,6 +31,8 @@
 #  include <windows.h>
 #elif defined(EMSCRIPTEN)
 #  include <emscripten.h>
+#elif defined(__WIIU__)
+#  include <sysapp/launch.h>
 #endif
 
 #include "async_handler.h"
@@ -255,7 +257,19 @@ void Player::MainLoop() {
 	Scene::old_instances.clear();
 
 	if (!Transition::instance().IsActive() && Scene::instance->type == Scene::Null) {
+#if defined(__WIIU__)
+		// Run the event loop once more because SDL cleans up the app
+		// after invocation of SYSLaunchMenu
+		if (!Player::exit_flag) {
+			SYSLaunchMenu();
+			Player::exit_flag = true;
+			MainLoop();
+		} else {
+			Exit();
+		}
+#else
 		Exit();
+#endif
 		return;
 	}