Fix set_menu()

README.md

@@ -43,7 +43,7 @@ The most simple kind of menus, contexts one, can be created like this:
     
     -- To add the menu to a widget:
     local mytextbox = wibox.widget.textbox()
-    mytextbox:set_menu(m,3) -- 3 = right mouse button, 1 = left mouse button
+    mytextbox:set_menu(menu,3) -- 3 = right mouse button, 1 = left mouse button
 ```
 
 In this example, a simple 3 item menu is created with a dynamically generated

init.lua

@@ -11,7 +11,8 @@ end
 
 local function set_menu(self,menu,button)
   if not menu then return end
-  local b,current,bt = button or 1,self:buttons(),aw_button({},b,function(geo)
+  local b = button or 1
+  local current,bt = self:buttons(),aw_button({},b,function(geo)
     local m =  menu
     if type(menu) == "function" then
       if self._tmp_menu and self._tmp_menu.visible then