update_dna() was calling dna.ready_dna() which internally calls
ResetSE(), setting all SE blocks to rand(1,1024) (the OFF range).
Any subsequent domutcheck(MUTCHK_FORCED) call would then deactivate
every trait gene because all SE values read as inactive, including
the morph gene itself.
Replace dna.ready_dna(src) with dna.ResetUIFrom(src), which re-encodes
appearance DNA from the mob's current state without touching the SE
layer. Also correct the stale sync_organ_dna(dna) call to the correct
no-argument form matching the proc signature.
Affected call sites that triggered this bug: the morph appearance
editor, change_gender, add_marking, remove_marking,
change_priority_of_marking, and change_marking_color.
Co-authored-by: Kashargul <144968721+Kashargul@users.noreply.github.com>
ARGUS
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