* Initialise _frameWidth and _frameHeight to prevent them from being undefined.
* Fix BS2 subtitle positioning. (Fixes bug #1499916)
* In BS2, copy the frame to the backend in 8-bit mode.
* Fix compilation in 8-bit mode.
BS2 subtitles aren't quite right in 8-bit mode, but I expect we want to
re-design things a bit if we ever add DXA cutscenes. We can fix minor details
then.
svn-id: r22859