Invalidate the lookup table when the screen changes. (TODO: We also have to invalidate it if the change happens between cutscenes, don't we?) Some cleanup, particularly in the BS2 cutscene player. More needed, I guess... svn-id: r13377
svn-id: r13365
svn-id: r13361
svn-id: r13359
svn-id: r13358
svn-id: r13357