[AD] set_volume_per_voice() maximum volume

["Ben Davis" <ben@xxxxxxxxxx>]

> Yes, it is a latency issue, also, a volume issue (if I understand the
> documentation correctly, Allegro at BEST outputs centered stereo
> waveforms at half volume)...

I suggested this before, but no one responded:

Does anyone want me to adjust the functionality of set_volume_per_voice() so
that centred stereo waveforms can play at full volume?

This would break backward compatibility, but only since WIP 3.9.34.

Alternatively I could do this:

void set_volume_per_voice_ex(int scale);
#define set_volume_per_voice(scale) set_volume_per_voice_ex(scale + 1)

But that's ugly.

What do you think?

Ben Davis