Let users know they have to enable a downloader

couchpotato/core/plugins/searcher/main.py

@@ -131,6 +131,7 @@ class Searcher(Plugin):
 
             return True
 
+        log.error('Tried to download, but none of the downloaders are enabled')
         return False
 
     def correctMovie(self, nzb = {}, movie = {}, quality = {}, **kwargs):