fix incorrect number of Nones in empty acquire

1 files changed, 1 insertions, 1 deletions

diff --git a/joblib.py b/joblib.py
index 6bde310..a0ce985 100644
--- a/joblib.py
+++ b/joblib.py
@@ -51,7 +51,7 @@ class JobQueue(object):
                         """, jobtype)
                         if result is None:
                             # no jobs available
-                            return None, None
+                            return None, None, None
                         jobid, payload, priority = result
                         await con.execute("""
                             UPDATE jobs