Add an empty completer as a more type-safe placeholder instead of
'None'.

Signed-off-by: John Snow <jsnow@redhat.com>
---
 scripts/qmp/qmp-shell | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/qmp/qmp-shell b/scripts/qmp/qmp-shell
index 73694035b2..670361322c 100755
--- a/scripts/qmp/qmp-shell
+++ b/scripts/qmp/qmp-shell
@@ -125,7 +125,7 @@ class QMPShell(qmp.QEMUMonitorProtocol):
     def __init__(self, address, pretty=False, verbose=False):
         super().__init__(self.parse_address(address))
         self._greeting = None
-        self._completer = None
+        self._completer = QMPCompleter()
         self._pretty = pretty
         self._transmode = False
         self._actions = list()
-- 
2.31.1