Gripper attackby fixes (#13571)

This cannot go wrong, can it?

code/game/objects/effects/burnt_wall.dm

@@ -20,7 +20,7 @@
 	if(I.iswelder())
 		var/obj/item/weldingtool/WT = I
 		if(!WT.isOn())
-			return
+			return TRUE
 		if(WT.remove_fuel(0,user))
 			user.visible_message("<b>[user]</b> starts slicing \the [src] apart.", SPAN_NOTICE("You start slicing \the [src] apart."))
 			playsound(src, 'sound/items/welder.ogg', 100, 1)
@@ -31,8 +31,8 @@
 				if(reinf_material)
 					reinf_material.place_sheet(get_turf(src))
 				qdel(src)
-			return
-	..()
+			return TRUE
+	return ..()
 
 /obj/effect/overlay/thermite
 	name = "burning thermite"
@@ -43,4 +43,4 @@
 	layer = 5
 
 /obj/effect/overlay/burnt_wall/steel/Initialize(mapload)
-	. = ..(mapload, "wall", MATERIAL_STEEL)
+	. = ..(mapload, "wall", MATERIAL_STEEL)

code/game/objects/effects/chem/foam.dm

@@ -180,29 +180,29 @@
 		var/obj/item/grab/G = I
 		if(G.state < GRAB_AGGRESSIVE)
 			to_chat(user, SPAN_WARNING("You need a stronger grip to do that!"))
-			return
+			return TRUE
 		G.affecting.forceMove(src.loc)
 		visible_message(SPAN_WARNING("[G.assailant] smashes [G.affecting] through the foamed metal wall."))
 		G.affecting.take_overall_damage(15)
 		qdel(I)
 		qdel(src)
-		return
+		return TRUE
 
 	else if(istype(I, /obj/item/stack/material))
 		var/obj/item/stack/material/S = I
 		if(S.get_amount() < 4)
 			to_chat(user, SPAN_NOTICE("There isn't enough material here to construct a wall."))
-			return
+			return TRUE
 
 		var/material/M = SSmaterials.get_material_by_name(S.default_type)
 		if(!istype(M))
-			return
+			return TRUE
 		if(M.integrity < 50)
 			to_chat(user, SPAN_NOTICE("This material is too soft for use in wall construction."))
-			return
+			return TRUE
 		user.visible_message("<b>[user]</b> starts slotting material into \the [src]...", SPAN_NOTICE("You start slotting material into \the [src], forming it into a wall..."))
 		if(!do_after(user, 10 SECONDS) || !S.use(4))
-			return
+			return TRUE
 		var/turf/Tsrc = get_turf(src)
 		var/original_type = Tsrc.type
 		Tsrc.ChangeTurf(/turf/simulated/wall)
@@ -211,18 +211,18 @@
 		T.set_material(M)
 		T.add_hiddenprint(usr)
 		qdel(src)
-		return
+		return TRUE
 
 	else if(istype(I, /obj/item/stack/tile/floor))
 		var/turf/T = get_turf(src)
 		if(T.type != /turf/space && !isopenturf(T)) // need to do a hard check here because transit turfs are also space turfs
 			to_chat(user, SPAN_WARNING("The tile below \the [src] isn't an open space, or space itself!"))
-			return
+			return TRUE
 		var/obj/item/stack/tile/floor/S = I
 		S.use(1)
 		T.ChangeTurf(/turf/simulated/floor/airless)
 		qdel(src)
-		return
+		return TRUE
 
 	user.do_attack_animation(src, I)
 	if(prob(I.force * 20 - metal * 25))
@@ -231,6 +231,7 @@
 	else
 		to_chat(user, SPAN_NOTICE("You hit the metal foam to no effect."))
 		shake_animation()
+	return TRUE
 
 /obj/structure/foamedmetal/CanPass(atom/movable/mover, turf/target, height=1.5, air_group = 0)
 	if(air_group)

code/game/objects/effects/decals/Cleanable/humans.dm

@@ -66,8 +66,8 @@
 
 /obj/effect/decal/cleanable/attackby(obj/item/I, mob/user)
 	if(istype(I, /obj/item/gun/energy/rifle/cult))
-		return
-	..()
+		return TRUE
+	return ..()
 
 /obj/effect/decal/cleanable/blood/update_icon()
 	if(basecolor == "rainbow") basecolor = get_random_colour(1)

code/game/objects/effects/decals/contraband.dm

@@ -135,7 +135,7 @@
 		else
 			to_chat(user, "<span class='notice'>You carefully remove the poster from the wall.</span>")
 			roll_and_drop(user.loc)
-		return
+		return TRUE
 
 
 /obj/structure/sign/poster/attack_hand(mob/user as mob)

code/game/objects/effects/decals/remains.dm

@@ -43,8 +43,8 @@
 
 /obj/effect/decal/remains/attackby(obj/item/I, mob/user)
 	if(istype(I, /obj/item/gun/energy/rifle/cult))
-		return
-	..()
+		return TRUE
+	return ..()
 
 //Target turns to ash.
 /obj/effect/decal/remains/proc/crumble()

code/game/objects/effects/plastic_explosive.dm

@@ -46,4 +46,4 @@
 	to_chat(user, SPAN_WARNING("\The [src] is solidly attached, it doesn't budge!"))
 
 /obj/effect/plastic_explosive/attackby(var/obj/item/I, var/mob/user)
-	parent.attackby(I, user)
+	return parent.attackby(I, user)

code/game/objects/effects/portals.dm

@@ -44,7 +44,7 @@
 	if(istype(I, /obj/item/bluespace_neutralizer))
 		user.visible_message("<b>[user]</b> collapses \the [src] with \the [I].", SPAN_NOTICE("You collapse \the [src] with \the [I]."))
 		qdel(src)
-		return
+		return TRUE
 	return ..()
 
 /obj/effect/portal/attack_hand(mob/user)
@@ -226,7 +226,7 @@
 /obj/effect/portal/revenant/attackby(obj/item/I, mob/user)
 	if(istype(I, /obj/item/bluespace_neutralizer))
 		to_chat(user, SPAN_WARNING("You need to activate \the [I] and keep it near \the [src] to collapse it."))
-		return
+		return TRUE
 	return ..()
 
 /obj/effect/portal/revenant/proc/reduce_health(var/amount = 1)
@@ -264,4 +264,4 @@
 #undef COLOR_STAGE_THREE
 #undef COLOR_STAGE_TWO
 #undef COLOR_STAGE_ONE
-#undef COLOR_STAGE_ZERO
+#undef COLOR_STAGE_ZERO

code/game/objects/effects/spiders.dm

@@ -28,6 +28,7 @@
 		if(WT.remove_fuel(0, user))
 			damage = 15
 			playsound(loc, 'sound/items/welder.ogg', 100, 1)
+		return TRUE
 	else
 		user.do_attack_animation(src)
 		playsound(loc, W.hitsound, 50, 1, -1)
@@ -277,11 +278,12 @@
 	die()
 
 /obj/effect/spider/spiderling/attackby(var/obj/item/W, var/mob/user)
-	..()
+	. = ..()
 	if(istype(W, /obj/item/newspaper))
 		var/obj/item/newspaper/N = W
 		if(N.rolled)
 			die()
+			return TRUE
 
 /**
  * Makes the organ spew out all of the spiderlings it has. It's triggered at the point