fastannotate: pconvert paths from the server for Windows

I'm guessing that the right thing to do here is to convert the paths on the
server, but I know this is a WIP, and I don't know where that needs to happen.
I'm just trying to eliminate the malicious path warnings in the tests.

hgext/fastannotate/protocol.py

@@ -15,6 +15,7 b' from mercurial import ('
     extensions,
     hg,
     localrepo,
+    util,
     wireprotov1peer,
     wireprotov1server,
 )
@@ -166,6 +167,8 b' def clientfetch(repo, paths, lastnodemap'
     ui.debug('fastannotate: server returned\n')
     for result in results:
         r = result.result()
+        # TODO: pconvert these paths on the server?
+        r = {util.pconvert(p): v for p, v in r.iteritems()}
         for path in sorted(r):
             # ignore malicious paths
             if not path.startswith('fastannotate/') or '/../' in (path + '/'):