Fixes #6489 - Was comparing string against dictionary key without checking if the key existed first.

couchpotato/core/media/_base/providers/torrent/hd4free.py

@@ -25,6 +25,7 @@ class Base(TorrentProvider):
     def _search(self, movie, quality, results):
         data = self.getJsonData(self.urls['search'] % (self.conf('apikey'), self.conf('username'), getIdentifier(movie), self.conf('internal_only')))
 
+        if 'error' in data:
             if data:
                 if self.login_fail_msg in data['error']: # Check for login failure
                     self.disableAccount()