Fix stuff in StorageAppend engine
Fix stuff in StorageAppend engine

codeaudit/mapdb,lamfire/mapdb,cocosli/mapdb,mebigfatguy/mapdb,olupas/MapDB,SleimanJneidi/mapdb,ffjiao/mapdb,jankotek/mapdb,sumit784/mapdb,binarytemple/mapdb,morfeo8marc/mapdb,hangum/mapdb,jankotek/MapDB,olupas/MapDB,mebigfatguy/mapdb,jankotek/mapdb,ringoluo/mapdb,pettermahlen/mapdb,jankotek/MapDB