commit may have broken nntp

Commit 04340d91 may have broken nttp. It seems like the message base isn't reopened when a command it sent from the client to the nntpserver.

After a while I started getting

This message can't be displayed.
  This is probably due to a network error.

The application reports this in the console

(claws-mail:620218): Claws-Mail-WARNING **: 15:16:46.700: can't read article 21741

(claws-mail:620218): Claws-Mail-WARNING **: 15:16:46.700: can't get message file path

In my usenet client.

I can see it try to get the article in the sbbs log

Sep 16 15:16:46 bbs synchronet: srvc 0052 NNTP [DOVE-Net.Synchronet_Programming] cmd: ARTICLE 21741

If I disconnect and reconnect then I get the message.