[gnome-panel] panel: Fix loading of main menu

[Vincent Untz <vuntz src gnome org>]

commit 066c35f46008582027f2deedc660b348496c2be5
Author: Vincent Untz <vuntz gnome org>
Date:   Mon Sep 19 17:13:41 2011 +0200

    panel: Fix loading of main menu
    
    https://bugzilla.gnome.org/show_bug.cgi?id=658863

 gnome-panel/panel-menu-button.c |    9 ++++++---
 1 files changed, 6 insertions(+), 3 deletions(-)
---
diff --git a/gnome-panel/panel-menu-button.c b/gnome-panel/panel-menu-button.c
index bedf6a6..c852189 100644
--- a/gnome-panel/panel-menu-button.c
+++ b/gnome-panel/panel-menu-button.c
@@ -749,9 +749,12 @@ panel_menu_button_load (PanelWidget *panel,
 	tooltip = g_settings_get_string (settings_instance,
 					 PANEL_MENU_BUTTON_TOOLTIP_KEY);
 
-	scheme = g_strndup (menu_path, strcspn (menu_path, ":"));
-	root = panel_menu_scheme_to_path_root (scheme);
-	g_free (scheme);
+	if (!PANEL_GLIB_STR_EMPTY (menu_path)) {
+		scheme = g_strndup (menu_path, strcspn (menu_path, ":"));
+		root = panel_menu_scheme_to_path_root (scheme);
+		g_free (scheme);
+	} else
+		root = APPLICATIONS_MENU;
 
 	if (root == LAST_MENU) {
 		g_printerr ("Unknown menu scheme, cannot load menu button\n");