Fix decoding issue with some Redis keys

modules/userinfo.py

@@ -204,7 +204,7 @@ def delUserByNetwork(name, nick, user): # quit
     p.srem(gnamespace, user)
     for i in main.r.smembers(chanspace):
         p.srem("live.who."+name+"."+i.decode(), nick)
-        p.hdel("live.prefix."+name+"."+i, nick)
+        p.hdel("live.prefix."+name+"."+i.decode(), nick)
 
     p.delete(chanspace)
     p.hdel(mapspace, nick)