roots_seat_destroy: also destroy seat in public function

Rework the functions a bit so that the handler does the bulk of the work
except for destroying the seat itself, and the main public function
just explicitely calls the handler and destroys the seat

rootston/seat.c

@@ -222,23 +222,23 @@ static void roots_seat_init_cursor(struct roots_seat *seat) {
 
 static void seat_view_destroy(struct roots_seat_view *seat_view);
 
-void roots_seat_destroy(struct roots_seat *seat) {
-	struct roots_seat_view *view, *nview;
+static void roots_seat_handle_seat_destroy(struct wl_listener *listener,
+		void *data) {
+	struct roots_seat *seat =
+		wl_container_of(listener, seat, seat_destroy);
 
 	// TODO: probably more to be freed here
+	wl_list_remove(&seat->seat_destroy.link);
 
+	struct roots_seat_view *view, *nview;
 	wl_list_for_each_safe(view, nview, &seat->views, link) {
 		seat_view_destroy(view);
 	}
-	// Can be called from seat_destroy handler, so don't destroy seat
 }
 
-static void roots_seat_handle_seat_destroy(struct wl_listener *listener,
-		void *data) {
-	struct roots_seat *seat =
-		wl_container_of(listener, seat, seat_destroy);
-
-	roots_seat_destroy(seat);
+void roots_seat_destroy(struct roots_seat *seat) {
+	roots_seat_handle_seat_destroy(&seat->seat_destroy, seat->seat);
+	wlr_seat_destroy(seat->seat);
 }
 
 struct roots_seat *roots_seat_create(struct roots_input *input, char *name) {