ROC --no-semilogx plots are broken
In ROC plots, when --no-semilogx is provided the y axis values change from
FRR and the plot looks very similar to a DET curve which is the expected behavior.
However, the dots shown on the plot (activated using --lines-at 1e-3,1e-4,...) are still drawn using the
1-FRR values. Hence the dots do not fall on the ROC plots.
I have observed this behavior in
bob bio roc but since it's implemented here, I suspect the bug is in here.