ThinningUtils: Fix for running on r21 ESDs.
r21 ESDs don't have CHSNeutralParticleFlowObjects, and if we're running ESDtoAOD, we won't make it either. Fix the test for if we're making it --- jetFlags.Enabled() must be true.
r21 ESDs don't have CHSNeutralParticleFlowObjects, and if we're running ESDtoAOD, we won't make it either. Fix the test for if we're making it --- jetFlags.Enabled() must be true.