hostname: Make sure we pass error to bus_verify_polkit_async()

Fixes #28943

src/hostname/hostnamed.c

@@ -1318,7 +1318,7 @@ static int method_describe(sd_bus_message *m, void *userdata, sd_bus_error *erro
                         false,
                         UID_INVALID,
                         &c->polkit_registry,
-                        NULL);
+                        error);
         if (r == 0)
                 return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
 

src/shared/bus-polkit.c

@@ -480,6 +480,7 @@ int bus_verify_polkit_async(
         assert(call);
         assert(action);
         assert(registry);
+        assert(ret_error);
 
         r = check_good_user(call, good_user);
         if (r != 0)