[balsa] Do not leak file descriptors whenever Mailbox::add_messages is called.

[Pawel Salek <pawels src gnome org>]

commit 100ae49003ff95f8db76315e134df4af61151926
Author: Pawel Salek <pawsa0 gmail com>
Date:   Mon Apr 5 20:01:41 2010 +0200

    Do not leak file descriptors whenever Mailbox::add_messages is called.

 ChangeLog          |    5 +++++
 libbalsa/mailbox.c |    2 +-
 2 files changed, 6 insertions(+), 1 deletions(-)
---
diff --git a/ChangeLog b/ChangeLog
index 857eab5..64b24c4 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2010-04-05  Pawel Salek
+
+	* libbalsa/mailbox.c: Mailbox::add_messages would leak a file descriptor
+	each time it was called.
+
 2010-03-29  Peter Bloomfield
 
 	* src/balsa-index.c (bndx_instance_init),
diff --git a/libbalsa/mailbox.c b/libbalsa/mailbox.c
index cdb25bf..a2a79ad 100644
--- a/libbalsa/mailbox.c
+++ b/libbalsa/mailbox.c
@@ -1781,7 +1781,7 @@ msg_iterator(LibBalsaMessageFlag *flg, GMimeStream **stream, void *arg)
     *flg = amd->flags;
     *stream = amd->stream;
  /* Make sure ::add_messages does not destroy the stream. */
-    g_object_ref(amd->stream);
+    if (!res) g_object_ref(amd->stream);
     return res;
 }