Remove naked returns from leveldb/cache/lru_cache.go.
Remove naked returns from leveldb/cache/lru_cache.go.

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