It was actually Google Summer of Code student Egor Suvorov who implemented the Haiku MIDI support.

Thanks! :)

We shouldn't redefine SLONG and ULONG

Updated with missing changes

Fixed bug 1370 - Random segmentation fault when using Mix_RewindMusic and Mix_SetMusicPosition with a mp3 file

This was a bug in smpeg, patch attached here:
http://bugzilla.libsdl.org/attachment.cgi?id=771

Updated smpeg binaries for release

The seek position is an absolute one, not a skip from the current time.

Fixed MOD playback on 64-bit Windows

Switched compatibility version to 1 since the ABI is compatible with previous versions

Don't use the converted audio pointer unless we actually used converted audio...

Fixed memory crash loading Ogg Vorbis files on Windows
The pointer to the audio data could come from SDL_LoadWAV_RW() or from our other loaders, and we need to use the correct free() to release the memory. So we'll just use the SDL memory functions for consistency.
This pretty much only matters on Windows where we can't guarantee a certain C runtime so we provide our own malloc() and friends.

Don't do extra memory allocations if we're not going to end up converting the audio.
Added a missing file close.