Index: menu_clone/menu_clone.module
===================================================================
--- menu_clone/menu_clone.module	(revision 4918)
+++ menu_clone/menu_clone.module	(working copy)
@@ -46,38 +46,40 @@ function menu_clone_load($menu_name) {
 
   $menu = db_query("SELECT * FROM {menu_custom} WHERE menu_name = :menu_name", array(':menu_name' => $menu_name))->fetchAssoc();
 
-  if (strpos($menu['menu_name'], 'menu-') === 0) {
-    $menu['menu_name'] = drupal_substr($menu['menu_name'], 5);
-  }
+  if (!empty($menu)) {
+    if (strpos($menu['menu_name'], 'menu-') === 0) {
+      $menu['menu_name'] = drupal_substr($menu['menu_name'], 5);
+    }
 
-  $new_name = drupal_substr('clone-' . $menu['menu_name'], 0, MENU_MAX_MENU_NAME_LENGTH_UI);
-  $sql = "SELECT menu_name FROM {menu_custom} WHERE menu_name = :menu_name";
-  $result = db_query($sql, array(':menu_name' => 'menu-' . $new_name))->fetchField();
-  $i = 1;
-  while (!empty($result)) {
-    $new_name = drupal_substr('clone' . $i . '-' . $menu['menu_name'], 0, MENU_MAX_MENU_NAME_LENGTH_UI);
+    $new_name = drupal_substr('clone-' . $menu['menu_name'], 0, MENU_MAX_MENU_NAME_LENGTH_UI);
+    $sql = "SELECT menu_name FROM {menu_custom} WHERE menu_name = :menu_name";
     $result = db_query($sql, array(':menu_name' => 'menu-' . $new_name))->fetchField();
-    $i++;
-  }
+    $i = 1;
+    while (!empty($result)) {
+      $new_name = drupal_substr('clone' . $i . '-' . $menu['menu_name'], 0, MENU_MAX_MENU_NAME_LENGTH_UI);
+      $result = db_query($sql, array(':menu_name' => 'menu-' . $new_name))->fetchField();
+      $i++;
+    }
 
-  $sql = "SELECT m.load_functions, m.to_arg_functions, m.access_callback, m.access_arguments, m.page_callback, m.page_arguments, m.title, m.title_callback, m.title_arguments, m.type, m.description, ml.*
-    FROM {menu_links} ml LEFT JOIN {menu_router} m ON m.path = ml.router_path
-    WHERE ml.menu_name = :menu_name
-    ORDER BY p1 ASC, p2 ASC, p3 ASC, p4 ASC, p5 ASC, p6 ASC, p7 ASC, p8 ASC, p9 ASC";
-  $result = db_query($sql, array(':menu_name' => $menu_name));
-  $links = array();
-  while ($row = $result->fetchAssoc()) {
-    $links[] = $row;
+    $sql = "SELECT m.load_functions, m.to_arg_functions, m.access_callback, m.access_arguments, m.page_callback, m.page_arguments, m.title, m.title_callback, m.title_arguments, m.type, m.description, ml.*
+      FROM {menu_links} ml LEFT JOIN {menu_router} m ON m.path = ml.router_path
+      WHERE ml.menu_name = :menu_name
+      ORDER BY p1 ASC, p2 ASC, p3 ASC, p4 ASC, p5 ASC, p6 ASC, p7 ASC, p8 ASC, p9 ASC";
+    $result = db_query($sql, array(':menu_name' => $menu_name));
+    $links = array();
+    while ($row = $result->fetchAssoc()) {
+      $links[] = $row;
+    }
+    $tree = menu_tree_data($links);
+    $node_links = array();
+    menu_tree_collect_node_links($tree, $node_links);
+    $menu_admin = TRUE;
+    menu_tree_check_access($tree, $node_links);
+    $menu_admin = FALSE;
+
+    $menu['menu_name'] = $new_name;
+    $menu['title'] = t('Clone of') . ' ' . $menu['title'];
+    $menu['tree'] = $tree;
+    return $menu;
   }
-  $tree = menu_tree_data($links);
-  $node_links = array();
-  menu_tree_collect_node_links($tree, $node_links);
-  $menu_admin = TRUE;
-  menu_tree_check_access($tree, $node_links);
-  $menu_admin = FALSE;
-
-  $menu['menu_name'] = $new_name;
-  $menu['title'] = t('Clone of') . ' ' . $menu['title'];
-  $menu['tree'] = $tree;
-  return $menu;
 }
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