TGUI Medical Conversion

code/modules/surgery/implant.dm

@@ -119,6 +119,8 @@
 	max_duration = 100
 
 /datum/surgery_step/cavity/place_item/can_use(mob/living/user, mob/living/carbon/human/target, target_zone, obj/item/tool)
+	if(!istype(tool))
+		return 0
 	if(..())
 		var/obj/item/organ/external/affected = target.get_organ(target_zone)
 		if(istype(user,/mob/living/silicon/robot))

code/modules/surgery/limb_reattach.dm

@@ -28,6 +28,8 @@
 	max_duration = 70
 
 /datum/surgery_step/limb/attach/can_use(mob/living/user, mob/living/carbon/human/target, target_zone, obj/item/tool)
+	if(!istype(tool))
+		return 0
 	var/obj/item/organ/external/E = tool
 	var/obj/item/organ/external/P = target.organs_by_name[E.parent_organ]
 	var/obj/item/organ/external/affected = target.get_organ(target_zone)
@@ -117,7 +119,7 @@
 	max_duration = 100
 
 /datum/surgery_step/limb/mechanize/can_use(mob/living/user, mob/living/carbon/human/target, target_zone, obj/item/tool)
-	if(..())
+	if(..() && istype(tool))
 		var/obj/item/robot_parts/p = tool
 		if (p.part)
 			if (!(target_zone in p.part))

code/modules/surgery/organs_internal.dm

@@ -164,6 +164,9 @@
 	if (!..())
 		return 0
 
+	if(!istype(tool))
+		return 0
+
 	var/obj/item/organ/external/affected = target.get_organ(target_zone)
 
 	if(!(affected && !(affected.robotic >= ORGAN_ROBOT)))
@@ -227,6 +230,9 @@
 	if (!..())
 		return 0
 
+	if(!istype(tool))
+		return 0
+
 	target.op_stage.current_organ = null
 
 	var/list/removable_organs = list()
@@ -281,7 +287,7 @@
 	var/obj/item/organ/internal/O = tool
 	var/obj/item/organ/external/affected = target.get_organ(target_zone)
 
-	if(!affected)
+	if(!affected || !istype(O))
 		return
 
 	var/organ_compatible
@@ -361,6 +367,9 @@
 	if (!..())
 		return 0
 
+	if(!istype(tool))
+		return 0
+
 	target.op_stage.current_organ = null
 
 	var/list/removable_organs = list()
@@ -417,6 +426,9 @@
 	if (!..())
 		return 0
 
+	if(!istype(tool))
+		return 0
+
 	target.op_stage.current_organ = null
 
 	var/list/removable_organs = list()