Newton uninitialized value for residual criterion

The following settings

[Newton]
EnableResidualCriterion = true
EnableAbsoluteResidualCriterion = true
SatisfyResidualAndShiftCriterion = true
MaxAbsoluteResidual = 1e-25

give an error with valgrind for an uninitialized value in newtonsolver.hh:521. Might be residualNorm_ ...

Needs investigation.