cut overlays before applying new ones (#9653)

modular_chomp/code/modules/organs/organ_icon.dm

@@ -1,6 +1,7 @@
 /obj/item/organ/external/get_icon(var/skeletal, var/can_apply_transparency = TRUE)
 	var/digitigrade = 0
 
+	cut_overlays()
 	// preferentially take digitigrade value from owner if available, THEN DNA.
 	// this allows limbs to be set properly when being printed in the bioprinter without an owner
 	// this also allows the preview mannequin to update properly because customisation topic calls don't call a DNA check