Fixed incompatibility with PHP 5.4

tripal_pub/includes/pub_importers.inc

@@ -467,7 +467,7 @@ function tripal_pub_importer_setup_form_validate($form, &$form_state) {
   }
   // allow the selected remote database to validate any changes to the form if needed
   $callback = "tripal_pub_remote_validate_form_$remote_db";
-  call_user_func($callback, &$form, $form_state);
+  call_user_func($callback, $form, $form_state);
 }
 
 /**