I think we have a potential bug with the way subpicture_region_t->p_style
is used.
 Decoders allocate p_style memory in their context, so we don't free it in
spu_DestroyRegion. As vout object can live longer than decoder, I think
p_style might be used after the decoder has destroyed it.

 Can someone, who has worked on osd/spu internal, comment ?