Minor cleanup

core/wallpaper.lua

@@ -6,7 +6,6 @@ wallpaper.active = -1
 wallpaper.timenow = function()
 	local time = {}
 
-	local t
 	for t in string.gmatch(os.date("%H:%M"), "[^:]+") do
 		table.insert(time, t)
 	end
@@ -35,7 +34,6 @@ end
 
 -- Which image should be scheduled now?
 wallpaper.current = function()
-	local i
 	for i = #beautiful.wallpaper, 1, -1 do
 		if wallpaper.get_start_time(beautiful.wallpaper[i]) <= wallpaper.timenow() then
 			return i