escape from infinitive loop of fetching inventory folder with NULL uuid

indra/newview/llinventorybridge.cpp

@@ -2127,6 +2127,7 @@ void LLFolderBridge::openItem()
 	lldebugs << "LLFolderBridge::openItem()" << llendl;
 	LLInventoryModel* model = getInventoryModel();
 	if(!model) return;
+	if(mUUID.isNull()) return;
 	bool fetching_inventory = model->fetchDescendentsOf(mUUID);
 	// Only change folder type if we have the folder contents.
 	if (!fetching_inventory)

indra/newview/llinventorymodel.cpp

@@ -1267,6 +1267,8 @@ void LLInventoryModel::fetchInventoryResponder::error(U32 status, const std::str
 
 bool LLInventoryModel::fetchDescendentsOf(const LLUUID& folder_id)
 {
+	if(folder_id.isNull()) return false;
+	
 	LLViewerInventoryCategory* cat = getCategory(folder_id);
 	if(!cat)
 	{