tests/hghave

--- a/tests/hghave	Tue Feb 10 13:26:00 2009 -0600
+++ b/tests/hghave	Sun Feb 08 13:46:04 2009 +0100
@@ -27,7 +27,7 @@
 def has_bzr():
     try:
         import bzrlib
-        return True
+        return bzrlib.__doc__ != None
     except ImportError:
         return False