fix(surgery): fix advanced fixers not working

PR #10824
- Теперь операции с орган фиксерами работают.

code/datums/surgery/steps/internal.dm

@@ -596,6 +596,9 @@
 /datum/surgery_step/internal/fix_organ/multiple/pick_target_organ(atom/user, mob/living/carbon/human/target, target_zone)
 	return target.get_organ(target_zone)
 
+/datum/surgery_step/internal/fix_organ/multiple/check_target_organ(obj/item/organ/target_organ, mob/living/carbon/human/target, obj/item/tool, atom/user)
+	return istype(target_organ)
+
 /datum/surgery_step/internal/fix_organ/multiple/initiate(obj/item/organ/external/parent_organ, obj/item/organ/target_organ, mob/living/carbon/human/target, obj/item/tool, mob/user)
 	announce_preop(user,
 		"[user] starts treating damage to [target]'s [parent_organ] with \the [tool].",