[turbine] Add some type safety to application data

src/olympic/turbine/src/gba/context.hpp

@@ -17,7 +17,7 @@ class Context {
 		UpdateHandler updateHandler = [](Context&) -> int {return 0;};
 		keel::Context keelCtx;
 		KeyEventHandler keyEventHandler = nullptr;
-		void *applicationData = nullptr;
+		ox::Optional<std::array<char, sizeof(WrapBase) + sizeof(uintptr_t)>> applicationData;
 
 		// GBA impl data /////////////////////////////////////////////////////////
 		bool running = true;