Albino heroSlave

I don't know the albino system well so hopefully someone can help me.

If you pay to access the complete catalogue of slaves and try to buy the albino one, 'Virago' Kissa, you get an error about albinosOverride. I was wondering if it wasn't assigned correctly, so locally I've experimented with adding Object.assign in getHeroSlave() but even if that's part of it it doesn't dent the problem. @svornost ?

HT to ZZC for exposing the problem in #1542 (closed)