awful.button: export new

Signed-off-by: Julien Danjou <julien@danjou.info>

lib/awful/button.lua.in

@@ -27,7 +27,7 @@ ignore_modifiers = { "Lock", "Mod2" }
 -- CapsLock off.
 -- @see C api button() function for parameters.
 -- @return A table with one or several button objects.
-local function new(_, mod, ...)
+function new(mod, ...)
     local ret = {}
     local subsets = util.subsets(ignore_modifiers)
     for _, set in ipairs(subsets) do
@@ -36,6 +36,6 @@ local function new(_, mod, ...)
     return ret
 end
 
-setmetatable(_M, { __call = new })
+setmetatable(_M, { __call = function(_, ...) return new(unpack(arg)) end })
 
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