It doesn't work either. But bear in mind that this is a simplification. That
line will get replaced by somethin like:
for row in `obj_hess`:
for item in row:
values[idx] = obj_factor * item
idx += 1
RunWhich is not working. It is very strange, because I am using something similar [here](https://github.com/mantielero/ipopt.nim/blob/9967dc72130a45e8d6a675439f174cf24a01c941/src/ipopt.nim#L419) and it is working. That is what is making me thing that this is an error a not a bug.
