[MERGE] Fix test run from non-branch in repo

[John Arbash Meinel]

John Arbash Meinel has voted +1.
Status is now: Semi-approved
Comment:
I think we decided that rather than mucking around trying to simulate 
this situation we might as well just merge the fix.

Wouter, is this valid for bzr-0.14.0?

For details, see: 
http://bundlebuggy.aaronbentley.com/request/%3C20070116213001.GS3615%40jameswestby.net%3E