wayland: revert back to surface->deleteLater()

Author: Luke458

src/wayland/session_lock.cpp

@@ -73,7 +73,7 @@ void WlSessionLock::updateSurfaces(bool show, WlSessionLock* old) {
 	for (auto& [screen, surface]: map) {
 		if (!screens.contains(screen)) {
 			this->surfaces.remove(screen);
-			delete surface;
+			surface->deleteLater();
 		}
 	}
 
@@ -150,7 +150,7 @@ void WlSessionLock::unlock() {
 		}
 
 		for (auto* surface: this->surfaces) {
-			delete surface;
+			surface->deleteLater();
 		}
 		this->surfaces.clear();