Fixes a few more Destroys

code/game/mecha/mecha_parts.dm

@@ -17,13 +17,16 @@
 	var/datum/construction/construct
 	flags = CONDUCT
 
-	attackby(obj/item/W as obj, mob/user as mob, params)
-		if(!construct || !construct.action(W, user))
-			..()
-		return
+/obj/item/mecha_parts/chassis/Destroy()
+	QDEL_NULL(construct)
+	return ..()
 
-	attack_hand()
-		return
+/obj/item/mecha_parts/chassis/attackby(obj/item/W, mob/user, params)
+	if(!construct || !construct.action(W, user))
+		..()
+
+/obj/item/mecha_parts/chassis/attack_hand()
+	return
 
 /////////// Ripley
 

code/modules/admin/buildmode.dm

@@ -95,6 +95,7 @@
 	cl.images -= I
 	cl = null
 	qdel(I)
+	return ..()
 
 /obj/effect/buildmode_line
 	var/image/I
@@ -140,6 +141,8 @@
 /datum/click_intercept/Destroy()
 	for(var/button in buttons)
 		qdel(button)
+	buttons.Cut()
+	return ..()
 
 
 /datum/click_intercept/proc/create_buttons()
@@ -191,7 +194,7 @@
 	Reset()
 	areaimage.loc = null
 	qdel(areaimage)
-	..()
+	return ..()
 
 /datum/click_intercept/buildmode/create_buttons()
 	buttons += new /obj/screen/buildmode/mode(src)