Ensure Wayland integration instance accessor doesn't leak

Telegram/SourceFiles/platform/linux/linux_wayland_integration.cpp

@@ -123,12 +123,15 @@ WaylandIntegration::~WaylandIntegration() = default;
 WaylandIntegration *WaylandIntegration::Instance() {
 	if (!IsWayland()) return nullptr;
 	static std::optional<WaylandIntegration> instance(std::in_place);
+	[[maybe_unused]] static const auto Inited = [] {
 		base::qt_signal_producer(
 			QGuiApplication::platformNativeInterface(),
 			&QObject::destroyed
-	) | rpl::start_with_next([&] {
+		) | rpl::start_with_next([] {
 			instance = std::nullopt;
 		}, instance->_private->lifetime);
+		return true;
+	}();
 	if (!instance) return nullptr;
 	return &*instance;
 }