[meld] ui._gtktemplate: Be as lenient as possible in the template signature

[Kai Willadsen <kaiw src gnome org>]

commit a059e6cf4cb7a9ec8ecc7c7d80b7872108cdb935
Author: Kai Willadsen <kai willadsen gmail com>
Date:   Wed Jan 9 07:39:08 2019 +1000

    ui._gtktemplate: Be as lenient as possible in the template signature

 meld/ui/_gtktemplate.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/meld/ui/_gtktemplate.py b/meld/ui/_gtktemplate.py
index 72e3f36d..c1d15628 100644
--- a/meld/ui/_gtktemplate.py
+++ b/meld/ui/_gtktemplate.py
@@ -101,7 +101,7 @@ def register_template(cls):
 
 
 def init_template(self, cls, base_init_template):
-    self.init_template = lambda: None
+    self.init_template = lambda *args: None
 
     if self.__class__ is not cls:
         raise TypeError(