Task #11406: Inserted IntToFloat into Correlator pipeline if nch=1 for more uniform interface wrt nch>1, removing need for DelayAndBandPass to process station data, and allowing IntToFloat to operate both in correlator and bf pieplines. Fixed use of Zeroing in case of nch=1. Added test for flagging output and weights in tCorrelatorSubbandProcProcessSb.