move bool accessor to char for 22.2.97
Type of accessor has changed for decorators - IsoCloseByCorr_assocPflowDecor and IsoCloseByCorr_assocClustDecor - from bool to char. I don't quite know 'where' this was changed. But it is understandable to move from bool to char... I have found that empirically one needs to have char for 22.2.97 (bool was ok in 22.2.96).