[evolution] Bug #660861 - Avoid mark-all-read on a non-folder selection

[Milan Crha <mcrha src gnome org>]

commit 7225739d7d2a26f98c6835cf83e345894201a575
Author: Milan Crha <mcrha redhat com>
Date:   Mon Oct 10 22:30:48 2011 +0200

    Bug #660861 - Avoid mark-all-read on a non-folder selection

 plugins/mark-all-read/mark-all-read.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/plugins/mark-all-read/mark-all-read.c b/plugins/mark-all-read/mark-all-read.c
index 4fe19cf..a05515b 100644
--- a/plugins/mark-all-read/mark-all-read.c
+++ b/plugins/mark-all-read/mark-all-read.c
@@ -602,7 +602,8 @@ update_actions_cb (EShellView *shell_view,
 	g_object_get (shell_sidebar, "folder-tree", &folder_tree, NULL);
 	folder_uri = em_folder_tree_get_selected_uri (folder_tree);
 
-	visible = (scan_folder_tree_for_unread (folder_uri) > 0);
+	visible = em_folder_tree_get_selected (folder_tree, NULL, NULL)
+		  && scan_folder_tree_for_unread (folder_uri) > 0;
 	gtk_action_set_visible (action, visible);
 
 	g_object_unref (folder_tree);