Returns the number of possible appearance types for the specified armor model (armor part).
ITEM_APPR_ARMOR_MODEL_* The armor model number (armor part) for which the number of appearance types is to be returned.
This function determines the number of possible appearance types for a specified armor model (armor part).
For possible values of ITEM_APPR_ARMOR_MODEL_* see
Uses Get2DAstring, so might be slow if the relevant 2da file is not cached.
This is an internal function. See the note near the top of #include index for more details.
author: motu99, editor: Mistress