[balsa] mailbox: Reset messages-threaded in open method

[Peter Bloomfield <peterb src gnome org>]

commit 2f60f9224412db3774b17866b5d750c25752f464
Author: Peter Bloomfield <PeterBloomfield bellsouth net>
Date:   Sun Feb 2 16:08:11 2020 -0500

    mailbox: Reset messages-threaded in open method
    
    Reset messages-threaded in the open method instead of the close method.
    
    * libbalsa/mailbox.c (libbalsa_mailbox_open), (libbalsa_mailbox_close):

 ChangeLog          | 8 ++++++++
 libbalsa/mailbox.c | 2 +-
 2 files changed, 9 insertions(+), 1 deletion(-)
---
diff --git a/ChangeLog b/ChangeLog
index bff31af0e..00be7999d 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+2020-02-02  Peter Bloomfield  <pbloomfield bellsouth net>
+
+       mailbox: Reset messages-threaded in the open method instead of
+       the close method.
+
+       * libbalsa/mailbox.c (libbalsa_mailbox_open),
+       (libbalsa_mailbox_close):
+
 2020-02-02  Peter Bloomfield  <pbloomfield bellsouth net>
 
        Build: Do not check for getaddrinfo
diff --git a/libbalsa/mailbox.c b/libbalsa/mailbox.c
index c6b163ec3..2c23a9a74 100644
--- a/libbalsa/mailbox.c
+++ b/libbalsa/mailbox.c
@@ -602,6 +602,7 @@ libbalsa_mailbox_open(LibBalsaMailbox * mailbox, GError **err)
 
        saved_state = priv->state;
        priv->state = LB_MAILBOX_STATE_OPENING;
+        priv->messages_threaded = FALSE;
         retval =
             LIBBALSA_MAILBOX_GET_CLASS(mailbox)->open_mailbox(mailbox, err);
         if(retval) {
@@ -659,7 +660,6 @@ libbalsa_mailbox_close(LibBalsaMailbox * mailbox, gboolean expunge)
             g_source_remove(priv->set_threading_idle_id);
             priv->set_threading_idle_id = 0;
         }
-        priv->messages_threaded = FALSE;
 
         if (priv->run_filters_idle_id != 0) {
             g_source_remove(priv->run_filters_idle_id);