Skip duplicate attributes on asString, don't output pointer addresses.
Skip duplicate attributes on asString, don't output pointer addresses.

figment/niflib,BlazesRus/niflib,neomonkeus/niflib,BlazesRus/niflib,niftools/niflib,figment/niflib,amorilia/niflib,niftools/niflib,niftools/niflib,neomonkeus/niflib,figment/niflib,amorilia/niflib,neomonkeus/niflib