message: Fix storage directory deletion if app folder is not set
diff: @@ -964,7 +964,7 @@ void ApplicationImpl::CleanupFiles() {
  application_manager_.get_settings().app_storage_folder();
  directory_name += "/" + folder_name();
  - if (file_system::DirectoryExists(directory_name)) {
  + if (file_system::DirectoryExists(directory_name) && !folder_name().empty()) {
  std::vector<std::string> files = file_system::ListFiles(directory_name);
  AppFilesMap::const_iterator app_files_it;
  