Allow default arguments.

lib/python/Shared/DC/Scripts/Signature.py

@@ -88,7 +88,7 @@
 This provides support for simulating function signatures
 """
 
-__version__='$Revision: 1.1 $'[11:-2]
+__version__='$Revision: 1.2 $'[11:-2]
 
 class FuncCode:
 
@@ -104,7 +104,7 @@ class FuncCode:
 
 # This is meant to be imported directly into a class.
 
-def _setFuncSignature(self, defaults, varnames, argcount):
+def _setFuncSignature(self, defaults=None, varnames=(), argcount=0):
     # Generate a change only if we have to.
     if self.func_defaults != defaults:
         self.func_defaults = defaults