squash! taskdistribution: Wrap in xmlrpclib.Binary if needed

Support unicode, by encoding them.

erp5/util/taskdistribution/__init__.py

@@ -97,8 +97,10 @@ def patchRPCParser(error_handler):
 
 def binarize_args(arg):
   # Converts recursively basestring arg into Binary
+  if isinstance(arg, unicode):
+    arg = arg.encode('utf-8')
   if isinstance(arg, basestring):
-    return xmlrpclib.Binary(arg.encode('utf-8'))
+    return xmlrpclib.Binary(arg)
   if isinstance(arg, (list, tuple)):
     return map(binarize_args, arg)
   if isinstance(arg, dict):