people who explicitely set mpeg_video in the previous version will end
  up with libmpeg2 in 0.6.0.
* modules/codec/libmpeg2.c: Fixed a potential segfault, especially
  with DVDs.
* modules/codec/lpcm.c: Send two PES packets in one aout buffer, because
  some audio filters (read: coreaudio resampler) don't like too small
  packets (I know, this is ugly).