gpg: unbreak 02a12835b17e. We need a test.

hgext/gpg.py

@@ -255,7 +255,7 b' def sign(ui, repo, *revs, **opts):'
                              % hgnode.short(n)
                              for n in nodes])
     try:
-        m = match.exact(['.hgsigs'])
+        m = match.exact(repo.root, '', ['.hgsigs'])
         repo.commit(message, opts['user'], opts['date'], match=m)
     except ValueError, inst:
         raise util.Abort(str(inst))