Ignore rendering invalid/unindexed armour
Ignore rendering invalid/unindexed armour

Fixes #192 and #193

R2pChyou/starcheat,wizzomafizzo/starcheat,R2pChyou/starcheat,kamilion/starcheat,wizzomafizzo/starcheat,chrmoritz/starcheat,kamilion/starcheat,chrmoritz/starcheat