u.umonnum was used to create the corpse in a bones file. However, unless
you're polymorphed and manage to actually die in that form, u.umonnum
refers to a role monster, which all have M2_HUMAN set, so they're all
human. Even if the role monsters were mutated dynamically when the game
starts, the problem would still exist, just in a different form.
Use urace to determine the corpse type instead.
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