check if `attribs` property is available in getAttribValue, always assume the existance of children in findAll
check if `attribs` property is available in getAttribValue, always assume the existance of children in findAll

fb55/DomUtils,fb55/domutils,mail-apps/domutils,websecurify/domutils-browserify-ws,liuxiong332/node-htmlparser-domutils