save/restore only the vfunc call, not the whole render() function
save/restore only the vfunc call, not the whole render() function

This ensures clip regions etc set up by the render vfunc get properly removed
for mask() etc call - fixes test/image/mask-textfield test

freedesktop-unofficial-mirror/swfdec__swfdec,freedesktop-unofficial-mirror/swfdec__swfdec,mltframework/swfdec,mltframework/swfdec,freedesktop-unofficial-mirror/swfdec__swfdec