Changed way Packs cannot be created if there is no Renderer.

core/cross/object_manager.cc

Index: core/cross/object_manager.cc
===================================================================
--- core/cross/object_manager.cc	(revision 19521)
+++ core/cross/object_manager.cc	(working copy)
@@ -43,8 +43,7 @@
 
 ObjectManager::ObjectManager(ServiceLocator* service_locator)
     : service_locator_(service_locator),
-      service_(service_locator_, this),
-      allow_pack_creation_(true) {
+      service_(service_locator_, this) {
 }
 
 ObjectManager::~ObjectManager() {
@@ -54,10 +53,6 @@
   DLOG_ASSERT(object_map_.empty()) << "Client node leak.";
 }
 
-void ObjectManager::DisallowPackCreation() {
-  allow_pack_creation_ = false;
-}
-
 std::vector<ObjectBase*> ObjectManager::GetObjects(
     const String& name,
     const String& class_type_name) const {
@@ -134,10 +129,6 @@
 }
 
 Pack* ObjectManager::CreatePack() {
-  if (!allow_pack_creation_) {
-    O3D_ERROR(service_locator_) << "Pack creation not allowed";
-    return NULL;
-  }
   Pack::Ref pack(new Pack(service_locator_));
   if (pack) {
     pack_array_.push_back(pack);