Fixed subtitles upgrade job trying to upgrade null scored subtitles (part 2). #1909

bazarr/subtitles/upgrade.py

@@ -86,7 +86,7 @@ def upgrade_subtitles():
     if settings.general.getboolean('use_radarr'):
         upgradable_movies_conditions = [(TableHistoryMovie.action << query_actions),
                                         (TableHistoryMovie.timestamp > minimum_timestamp),
-                                        (TableHistoryMovie.score is not None)]
+                                        (TableHistoryMovie.score.is_null(False))]
         upgradable_movies_conditions += get_exclusion_clause('movie')
         upgradable_movies = TableHistoryMovie.select(TableHistoryMovie.video_path,
                                                      TableHistoryMovie.language,