screen: Support property fallback

lib/awful/screen.lua

@@ -15,6 +15,7 @@ local capi =
     client = client
 }
 local util = require("awful.util")
+local object = require("gears.object")
 
 local function get_screen(s)
     return s and capi.screen[s]
@@ -245,6 +246,9 @@ end
 
 capi.screen.add_signal("padding")
 
+-- Extend the luaobject
+object.properties(capi.screen, {auto_emit=true})
+
 return screen
 
 -- vim: filetype=lua:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80