AUDIO: Add some padding to the QDM2 decoder input buffer

Fixes out of bounds reads in the Myst ME intro videos.

OOB reads may happen because:
- The bitstream implementation reads 4 bytes at a time, and the buffer
  size is not guaranteed to be a multiple of 4.
- The huffman parsing code reads a fixed amount of bits when it
  sometimes needs not all of them.

Also fixed bits vs bytes mismatch for the size parameter of the calls to
the bitstream constructor, and removed a few unnecessary heap
allocations.

Fixes #10220.

0 files changed, 0 insertions, 0 deletions