fixed problem in multiplex optimizer. We now always set the seqbase of void bats to 0.
fixed problem in multiplex optimizer. We now always set the seqbase
of void bats to 0.

zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb