Index: ec_live_subproducts.module
===================================================================
RCS file: /cvs/drupal-contrib/contributions/modules/ec_live_subproducts/ec_live_subproducts.module,v
retrieving revision 1.1.1.2.2.5
diff -u -p -r1.1.1.2.2.5 ec_live_subproducts.module
--- ec_live_subproducts.module	16 Apr 2007 00:10:20 -0000	1.1.1.2.2.5
+++ ec_live_subproducts.module	29 Aug 2007 10:30:14 -0000
@@ -481,7 +481,9 @@ function ec_live_subproducts_installmodu
  * site navigation menu, for example.
  */
 function ec_live_subproducts_link($type, $node = NULL, $teaser = false) {
-  if (!is_array(module_invoke($node->ptype, "productapi", NULL, "subproduct_types"))) {return;}
+  if (empty($node->ptype) or !is_array(module_invoke($node->ptype, "productapi", NULL, "subproduct_types"))) {
+    return;
+  }
   $links = array();
   $links["add_to_cart"] = array();
   return $links;