mercurial/posix.py

--- a/mercurial/posix.py	Fri Jul 22 09:55:46 2011 +0200
+++ b/mercurial/posix.py	Fri Jul 22 10:31:56 2011 +0200
@@ -338,3 +338,5 @@
     except OSError:
         pass
 
+def lookupreg(key, name=None, scope=None):
+    return None