convert: Don't decode unicode strings

convert: Don't decode unicode strings

This does not work with python2.3 and is probably not useful anyway with 2.4.

--- a/hgext/convert/convcmd.py	Sat Feb 09 13:08:02 2008 +0100
+++ b/hgext/convert/convcmd.py	Sat Feb 09 13:13:46 2008 +0100
@@ -241,7 +241,10 @@
     def convert(self):
 
         def recode(s):
-            return s.decode('utf-8').encode(orig_encoding, 'replace')
+            if isinstance(s, unicode):
+                return s.encode(orig_encoding, 'replace')
+            else:
+                return s.decode('utf-8').encode(orig_encoding, 'replace')
 
         try:
             self.source.before()