[balsa] Recheck index->mailbox_node

[Peter Bloomfield <PeterB src gnome org>]

commit a100b36be443e617e8a01879e2ef5b0bab5904ac
Author: Peter Bloomfield <PeterBloomfield bellsouth net>
Date:   Sat Mar 27 08:07:20 2010 -0400

    Recheck index->mailbox_node
    
    	* src/balsa-index.c (bndx_destroy): recheck index->mailbox_node
    	after dropping the gdk lock.

 ChangeLog         |    5 +++++
 src/balsa-index.c |   10 +++++++---
 2 files changed, 12 insertions(+), 3 deletions(-)
---
diff --git a/ChangeLog b/ChangeLog
index 8e28467..c5139f7 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,10 @@
 2010-03-27  Peter Bloomfield
 
+	* src/balsa-index.c (bndx_destroy): recheck index->mailbox_node
+	after dropping the gdk lock.
+
+2010-03-27  Peter Bloomfield
+
 	* libbalsa/mailbox.c (libbalsa_mailbox_close): increase mailbox
 	ref count while closing it.
 
diff --git a/src/balsa-index.c b/src/balsa-index.c
index 699b9a0..d823d88 100644
--- a/src/balsa-index.c
+++ b/src/balsa-index.c
@@ -229,9 +229,13 @@ bndx_destroy(GtkObject * obj)
 	    libbalsa_mailbox_close(mailbox, balsa_app.expunge_on_close);
             gdk_threads_enter();
 	}
-	g_object_weak_unref(G_OBJECT(index->mailbox_node),
-                            (GWeakNotify) bndx_mbnode_weak_notify, index);
-	index->mailbox_node = NULL;
+
+	if (index->mailbox_node) {
+            g_object_weak_unref(G_OBJECT(index->mailbox_node),
+                                (GWeakNotify) bndx_mbnode_weak_notify,
+                                index);
+            index->mailbox_node = NULL;
+        }
     }
 
     if (index->search_iter) {