naughty: notify{run} gets notification object argument (FS#398)

Notifications will not be destroyed on 'run' execution unless the
provided 'run' function explicitly invokes die()/destroy(). For this
purpose run can now receive the notification object as argument.

naughty.notify{ text = 'hi',
                run = function(n)
                    awful.util.spawn('firefox')
                    n.die()
                end
}

Signed-off-by: koniu <gkusnierz@gmail.com>

lib/naughty.lua.in

@@ -295,8 +295,11 @@ function notify(args)
     notification.die = die
 
     local run = function ()
-        if args.run then args.run() end
-        die()
+        if args.run then
+            args.run(notification)
+        else
+            die()
+        end
     end
 
     local hover_destroy = function ()