merge from Feb2010: fixed ref-counting for BAT-of-BATs result created by TABLETcollect_bats
merge from Feb2010: fixed ref-counting for BAT-of-BATs result created by TABLETcollect_bats

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