FIX: posts would not auto rebake unless gravatar download was enabled

app/jobs/scheduled/periodical_updates.rb

@@ -28,7 +28,7 @@ module Jobs
       TopicTimer.ensure_consistency!
 
       # Forces rebake of old posts where needed, as long as no system avatars need updating
-      unless UserAvatar.where("last_gravatar_download_attempt IS NULL").limit(1).first
+      if !SiteSetting.automatically_download_gravatars || !UserAvatar.where("last_gravatar_download_attempt IS NULL").limit(1).first
         problems = Post.rebake_old(SiteSetting.rebake_old_posts_count)
         problems.each do |hash|
           post_id = hash[:post].id