[evolution] Forgot to disconnect a signal handler in EAttachmentButton.

[Matthew Barnes <mbarnes src gnome org>]

commit df8b6db32ebe7e4ced4f43c86a0fb859a1defd21
Author: Matthew Barnes <mbarnes redhat com>
Date:   Wed Feb 17 13:11:37 2010 -0500

    Forgot to disconnect a signal handler in EAttachmentButton.
    
    The "deactivate" handler for EAttachmentButton's popup menu was never
    disconnected, and I suspect it may be getting invoked after the button
    has been finalized.

 widgets/misc/e-attachment-button.c |   19 ++++++++++++++++---
 1 files changed, 16 insertions(+), 3 deletions(-)
---
diff --git a/widgets/misc/e-attachment-button.c b/widgets/misc/e-attachment-button.c
index dac9b28..d1b02c0 100644
--- a/widgets/misc/e-attachment-button.c
+++ b/widgets/misc/e-attachment-button.c
@@ -41,6 +41,7 @@ struct _EAttachmentButtonPrivate {
 	GtkWidget *expand_button;
 	GtkWidget *toggle_button;
 	GtkWidget *cell_view;
+	GtkWidget *popup_menu;
 
 	guint expandable : 1;
 	guint expanded   : 1;
@@ -278,17 +279,21 @@ static void
 attachment_button_set_view (EAttachmentButton *button,
                             EAttachmentView *view)
 {
-	GtkWidget *menu;
+	GtkWidget *popup_menu;
 
 	g_return_if_fail (button->priv->view == NULL);
 
 	button->priv->view = g_object_ref (view);
 
-	menu = e_attachment_view_get_popup_menu (view);
+	popup_menu = e_attachment_view_get_popup_menu (view);
 
 	g_signal_connect_swapped (
-		menu, "deactivate",
+		popup_menu, "deactivate",
 		G_CALLBACK (attachment_button_menu_deactivate_cb), button);
+
+	/* Keep a reference to the popup menu so we can
+	 * disconnect the signal handler in dispose(). */
+	button->priv->popup_menu = g_object_ref (popup_menu);
 }
 
 static void
@@ -400,6 +405,14 @@ attachment_button_dispose (GObject *object)
 		priv->cell_view = NULL;
 	}
 
+	if (priv->popup_menu != NULL) {
+		g_signal_handlers_disconnect_matched (
+			priv->popup_menu, G_SIGNAL_MATCH_DATA,
+			0, 0, NULL, NULL, object);
+		g_object_unref (priv->popup_menu);
+		priv->popup_menu = NULL;
+	}
+
 	/* Chain up to parent's dispose() method. */
 	G_OBJECT_CLASS (parent_class)->dispose (object);
 }