Log Message:
Update to version 1.2.5.

Based on a patch sent by Soren Jacobsen via PR pkg/21525.

Changes:

- handle the patching in a simpler way
- style nits

1.2.5:
======
- Worked around MacOS X deadlock between CoreAudio and QuickTime
- Fixed crash in native midi code with files with more than 32 tracks
- Added 8SVX format support to the AIFF loader
- Fixed volume control on WAVE music chunks
- Fixed volume control on MOD music chunks
- Added support for the Atari platform
- Patch from Steven Fuller to fix panning effect with 8-bit sounds.
- Patch from guy on 3DRealms forums to fix native win32 midi volume.
- Small, looping music samples should now be able to fade out correctly.
- Added shared library support for MacOS X
- Correctly report an error when using an unknown filetype
- Added support for loading Ogg Vorbis samples as an audio chunk
- Fixed to start playing another sample immediately when one finishes
- Fixed a volume bug when calling Mix_HaltChannel() on unused channel
- Fixed volume reset bug at end of channel fade.
- Mix_LoadMUS() will now accept an MP3 by file extension, instead of relying
  entirely on the magic number.