Set to 0 not active flavours
Created by: scarlehoff
In the previous evolution (I think apfel?) was setting to 0 the flavours that were not active.
Instead, with eko, a non-evolved flavour just remains unchanged, which means that values of -1e-7
in the bottom column are repeated for every value of Q until the threshold is reached.
Not a big issue in general, but if people have code that just breaks when it sees a negative value this would create unnecessary problems and we want our grids to be as problem free as possible.