merge from Jun2010: fixed ref-counting for BAT-of-BATs result created by TABLETcollect_bats
merge from Jun2010: 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