* commit '9a03c232':
  h263dec: Force padding bug workaround for H.263.

This is not merged as it breaks a good part of the error concealment/resilience for H.263
Also, messenger.h263 plays fine in ffmpeg.
If anyone has any other h263 files that do not work, please open an issue on trak or
mail me!

See: d225b0f7Merged-by: Michael Niedermayer <michaelni@gmx.at>