Bugfix for running with frac=1.0 in all datasets (!856) · Merge requests · Emanuele Roberto Nocera / nnpdf

Created by: scarlehoff

There was a bug where if you ran with all fracs set to 1.0 n3fit would fail. This was solved but I reintroduced it at some point.

This PR re-fixes the bug and adds a check so that I don't break things again.

Bugfix for running with frac=1.0 in all datasets