Update fluids.lua (#3501)

Using an empty fluid container on a filled container would make them both empty containers.
The script should copy the fluid type from the target container before transforming the target container to en empty one.
It was doing the reverse: transforming en empty one, then copying no fluid type

data/actions/scripts/other/fluids.lua

@@ -33,8 +33,8 @@ function onUse(player, item, fromPosition, target, toPosition, isHotkey)
 			item:transform(item:getId(), 0)
 			return true
 		elseif target.type ~= 0 and item.type == 0 then
-			target:transform(target:getId(), 0)
 			item:transform(item:getId(), target.type)
+			target:transform(target:getId(), 0)
 			return true
 		end
 	end