make rendering more accurate
make rendering more accurate

- Don't premultiply images, they are already premultiplied
- Use swfdec_color_apply_transform_premultiplied since the image is premultiplied

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