Failed download disabled

Make sure that the release is also marked as failed with SabNZB if deleting of failed download is disabled

couchpotato/core/downloaders/sabnzbd/main.py

@@ -155,7 +155,7 @@ class Sabnzbd(Downloader):
                             else:
                                 log.error("Unknown error: " + result[:40])
 
-                            return 'failed'
+                        return 'failed'
                     else:
                         return slot['status'].lower()