Not load plugin text domain unless file found

gistfile1.txt

/**
		 * Load the plugin text domain for translation.
		 *
		 * @since    2.0
		 */
		public function load_plugin_textdomain() {
	
			$domain = $this->plugin_slug;
			$locale = apply_filters( 'plugin_locale', get_locale(), $domain );
			
			$file = trailingslashit( WP_LANG_DIR ) . $domain . '/' . $domain . '-' . $locale . '.mo';
			
			if ( file_exists( $file )){
				load_textdomain( $domain, $file );
			}
		}