- candles, et al, light via catch_lit
- non-weapons can be damaged
- only flammable items can be damaged, previously SILVER objects, for example,
would get a message, but add_erosion_words wouldn't display a damage word
- can't track burnt food, put this in the "seems" case too
- PLASTIC items are is_flammable, which is appropriate for all current uses
- paper gets destroyed (special artifacts excepted by earlier check)
- a cursed potion now spills even if not dipping weapons
- charge for damaging unpaid objects this way
- still very hard to destroy PYEC this way
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