Minor cleanup

classes/mpc/mpc.lua

@@ -5,6 +5,7 @@ local widget_types = {
 local P = {
 	name = "mpc"
 }
+P.__index = P
 
 ---
 -- Internal methods
@@ -102,7 +103,6 @@ function P:new(args)
 		mpd_host = args.mpd_host or "localhost",
 	}
 	setmetatable(m, self)
-	self.__index = self
 
 	-- Create widget for this volume interface
 	m.widget = widget_types[m.widget_type]:new()

classes/mpc/widget.lua

@@ -1,4 +1,5 @@
 local P = {}
+P.__index = P
 
 function P:update(args)
 	if (args.error ~= nil) then
@@ -28,7 +29,6 @@ end
 function P:new()
 	local widget = {}
 	setmetatable(widget, self)
-	self.__index = self
 
 	widget.title = wibox.widget.textbox("MPD is not")
 	widget.title.valign = "center"