Sign of dual multipliers in quadprog wrapper

[stephane-caron]

There is an inconsistency in the quadprog wrapper when unwrapping dual multipliers:

proxqp_benchmark/solvers/quadprog.py

Lines 86 to 89 in 240c3f3

	if (meq>0 and n_in==0):
	y_sol = -y
	if (meq>0 and n_in>0):
	y_sol[eq_ids] = y[:meq]

That is, y_sol[eq_ids] is taken as -y when there is no inequality but +y when there are some.

I think +y is the correct conversion in this context, but to be checked.