Fix an error that I made with an optimization.  In the case of softupdates, we need to do vtruncbuf the old way.  Luoqi caught, found the bug and submitted this fix. Submitted by:	Luoqi Chen <luoqi@chen.ml.org>
Fix an error that I made with an optimization.  In the case
of softupdates, we need to do vtruncbuf the old way.  Luoqi
caught, found the bug and submitted this fix.
Submitted by:	Luoqi Chen <luoqi@chen.ml.org>

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase