[Unison-hackers] Fix bzr branch detection (was: [unison-svn] r328)

[Martin von Gagern]

Martin von Gagern wrote:
> I guess I'll try to detect the presence of bazaar by looking for its
> .bzr directory at the root of the branch, instead of looking at this
> revision string. Buit that'll have to wait till tomorrow.

Can you please apply the attached patch? It's probably easiest to simply
copy the single modification, instead of getting the revision number
aligned for patch to accept.

Greetings,
 Martin
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