Multiple problems related to sound support

[AMDmi3]

After update to 0.59 on FreeBSD:

• it no longer builds with -DNOSOUND (which I've used for 0.58):

  /wrkdirs/usr/ports/games/ivan/work/ivan-059/Main/Source/iconf.cpp:1189:3: error: use of undeclared identifier 'soundeffects'
  soundeffects::SetSfxVolume(SfxVolume.Value);
  ^

• it builds fine without NOSOUND, but there's an error message when starting a game

(which is also not removed cleanly and the game then paints over it).

With that, the game is playable, but there's no sound. I expect MIDI not to work on FreeBSD as it seem to be dependent on ALSA, but SDL_mixer should work fine.

[AquariusPower]

strange, I downloaded the 30MB src code of the tag v059 and: egrep "fragment" -irnI
but there is no fragment error message on the code. I guess it may be coming from something external to ivan.

To enable midi you need some synth working: https://github.com/Attnam/ivan/issues/637#issuecomment-1007860961 The synth app must be running for it to work btw :)