qxl: better cleanup for surface destroy

Add back a call to qxl_spice_destroy_surface_wait_complete() in qxl_spice_destroy_surface_wait(),
that was removed by commit c480bb7d

It is needed to complete surface-removal cleanup, for non async.
For async, qxl_spice_destroy_surface_wait_complete is called upon operation completion.
Signed-off-by: NUri Lublin <uril@redhat.com>
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

hw/qxl.c

@@ -201,6 +201,7 @@ static void qxl_spice_destroy_surface_wait(PCIQXLDevice *qxl, uint32_t id,
         spice_qxl_destroy_surface_async(&qxl->ssd.qxl, id, (uintptr_t)cookie);
     } else {
         qxl->ssd.worker->destroy_surface_wait(qxl->ssd.worker, id);
+        qxl_spice_destroy_surface_wait_complete(qxl, id);
     }
 }