Newznab failed when doing manual download

couchpotato/core/media/_base/providers/nzb/newznab.py

@@ -130,7 +130,7 @@ class Base(NZBProvider, RSS):
         hosts = self.getHosts()
 
         for host in hosts:
-            result = super(Newznab, self).belongsTo(url, host = host['host'], provider = provider)
+            result = super(Base, self).belongsTo(url, host = host['host'], provider = provider)
             if result:
                 return result