Fixes aciding a bucket while it's inside something being naughty. (#10003)

code/modules/reagents/Chemistry-Reagents/Chemistry-Reagents-Dispenser.dm

@@ -473,9 +473,9 @@
 	if(O.unacidable)
 		return
 	if((istype(O, /obj/item) || istype(O, /obj/effect/plant)) && (volume > meltdose))
-		var/obj/effect/decal/cleanable/molten_item/I = new/obj/effect/decal/cleanable/molten_item(O.loc)
+		var/obj/effect/decal/cleanable/molten_item/I = new/obj/effect/decal/cleanable/molten_item(get_turf(O))
 		I.desc = "Looks like this was \an [O] some time ago."
-		for(var/mob/M in viewers(5, O))
+		for(var/mob/M in viewers(get_turf(O), 5))
 			to_chat(M, "<span class='warning'>\The [O] melts.</span>")
 		qdel(O)
 		remove_self(meltdose) // 10 units of acid will not melt EVERYTHING on the tile

code/modules/reagents/dispenser/dispenser2.dm

@@ -117,6 +117,8 @@
 
 /obj/machinery/chemical_dispenser/ui_interact(mob/user, ui_key = "main",var/datum/nanoui/ui = null, var/force_open = 1)
 	// this is the data which will be sent to the ui
+	if(container && !container.reagents)  //sanity check in case you destroyed the container... such as if you dispensed acid into an acidable bucket.
+		container = null
 	var/data[0]
 	data["amount"] = amount
 	data["isBeakerLoaded"] = container ? 1 : 0