Fix typo in upserts code (#4505)

* fix obvious problem :|

* changelog

1 files changed, 1 insertions, 1 deletions

diff --git a/synapse/storage/_base.py b/synapse/storage/_base.py

index 5109bc3e2e..4872ff55b6 100644
--- a/synapse/storage/_base.py
+++ b/synapse/storage/_base.py
@@ -236,7 +236,7 @@ class SQLBaseStore(object):
             self._unsafe_to_upsert_tables.discard("user_ips")
 
         # If there's any tables left to check, reschedule to run.
-        if self.updates:
+        if updates:
             self._clock.call_later(
                 15.0,
                 run_as_background_process,