inotify: Do not raise TypeError when client.query returns None

When something went wrong in client.query, it returns None.
If inotify.debug=True, we will attempt in this case a zip(A, None, B), which
would raise a TypeError.

hgext/inotify/__init__.py

@@ -58,7 +58,7 b' def reposetup(ui, repo):'
                 if not ignored and not self.inotifyserver:
                     result = client.query(ui, repo, files, match, False,
                                           clean, unknown)
-                    if ui.config('inotify', 'debug'):
+                    if result and ui.config('inotify', 'debug'):
                         r2 = super(inotifydirstate, self).status(
                             match, False, clean, unknown)
                         for c,a,b in zip('LMARDUIC', result, r2):