Vending machine throwing tweaks

code/game/objects/items.dm

@@ -925,4 +925,8 @@ modules/mob/living/carbon/human/life.dm if you die, you will be zoomed out.
 
 // Like the above, but used for RPED sorting of parts.
 /obj/item/proc/rped_rating()
-	return get_rating()
+	return get_rating()
+
+// this gets called when the item gets chucked by the vending machine
+/obj/item/proc/vendor_action(var/obj/machinery/vending/V)
+	return

code/game/objects/items/weapons/grenades/grenade.dm

@@ -112,3 +112,6 @@
 	walk(src, null, null)
 	..()
 	return
+
+/obj/item/weapon/grenade/vendor_action(var/obj/machinery/vending/V)
+	activate(V)