Commit 56781537 authored by Ell's avatar Ell

app: apply spin-scale gamma to input, not output

In GimpSpinScale, apply the slider gamma to the input [min,max]
range, rather than the output [0,1] range, using an odd gamma
curve, in particular, so that we handle negative values correctly.
parent 92fd5675
Pipeline #162732 passed with stages
in 35 minutes and 17 seconds