iterator: MergedIterator: Check for error may occur after advancing iterator
iterator: MergedIterator: Check for error may occur after advancing iterator

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