IWD2: CharGen does not assign voice set prefix

[MarcelHB]

Bug description

The CRE files that I found in the game created by GemRB lack what NI calls Voice Set prefix, like the set male_fighter_1 has the prefix DMC_ for all files of the set.

So all PCs remain mute.

GemRB version (check as many as you know apply)

• [x] master as of this issue
• [ ] 0.9.3
• [ ] 0.9.2
• [ ] 0.9.1

[lynxlynxlynx]

Trivial: NextPress in CSound.py does not set the value in the actor, it currently only happens if you press play.

[lynxlynxlynx]

Actually it was already being set through preselection and something wipes PCStats->SoundSet.