One sound for multiple pieces

[dsmith71]

@dsmith71

Problem being that setting the increment to -1 reduces the GP by -1 in total. So if 10 are selected, the GP becomes 9 instead of 10 + (-1 x 10) and consequently, no sound at all

No luck so far resolving this, I tried looping the second trigger until the GP was equal to zero and the effect was much the same as setting the GP to zero directly (awful noise).

Darren