basis.data: fix issue with itemsChanged delta corruption
basis.data: fix issue with itemsChanged delta corruption

fateevv/basisjs,tyanas/basisjs,basisjs/basisjs,fateevv/basisjs,basisjs/basisjs,smelukov/basisjs,fateevv/basisjs,tyanas/basisjs,istrel/basisjs,istrel/basisjs,smelukov/basisjs,smelukov/basisjs,basisjs/basisjs,tyanas/basisjs,istrel/basisjs