ui: fix instances null check regression from 2f250e2

Signed-off-by: Rohit Yadav <rohit.yadav@shapeblue.com>

Author: yadvr

ui/scripts/instances.js

@@ -358,11 +358,13 @@
                     data: data,
                     success: function(json) {
                         var items = json.listvirtualmachinesresponse.virtualmachine;
-                        $.each(items, function(idx, vm) {
-                            if (vm.nic && vm.nic.length > 0 && vm.nic[0].ipaddress) {
-                                items[idx].ipaddress = vm.nic[0].ipaddress;
-                            }
-                        });
+                        if (items) {
+                            $.each(items, function(idx, vm) {
+                                if (vm.nic && vm.nic.length > 0 && vm.nic[0].ipaddress) {
+                                    items[idx].ipaddress = vm.nic[0].ipaddress;
+                                }
+                            });
+                        }
                         args.response.success({
                             data: items
                         });