Freeze when playing back Kyrandia's soundtrack (Freeze at set_subsong)

[Dwedit]

I've been encountering freezes when playing back the Kyrandia soundtrack. I managed to get the code to build, ran Winamp under the debugger, and found it freezing at the SendMessage line.

void MyPlayer::set_subsong(int subsong)
{
  plr.subsong = subsong;

  SendMessage(*myWindow,WM_COMMAND,WINAMP_BUTTON2,0);
}

I made a one line change to from SendMessage to PostMessage and haven't seen a freeze since.

I also think the current subsong system is cumbersome to use compared with other players that automatically add subsongs to the Playlist.