FIX: in readonly mode don't double count pages

lib/discourse_redis.rb

@@ -159,6 +159,7 @@ class DiscourseRedis
 
       fallback_handler.verify_master if !fallback_handler.master
       Discourse.received_readonly!
+      nil
     else
       raise ex
     end
@@ -231,6 +232,14 @@ class DiscourseRedis
     @redis.client.reconnect
   end
 
+  def namespace_key(key)
+    if @namespace
+      "#{namespace}:#{key}"
+    else
+      key
+    end
+  end
+
   def namespace
     RailsMultisite::ConnectionManagement.current_db
   end