db: table: fix incorrect statement and also set w.last with first key on first call of *tWriter.add() method
db: table: fix incorrect statement and also set w.last with first key on first call of *tWriter.add() method

no2key/goleveldb,zzl0/goleveldb,hustbill/goleveldb,chai2010/goleveldb,FactomProject/goleveldb,syndtr/goleveldb,trigrass2/goleveldb,conseweb/goleveldb,rentongzhang/goleveldb,ngaut/goleveldb,btcsuite/goleveldb