joyent/node — pull request #8072 by threeday0905 (2014-08-04 14:44:25+00:00)
Title: bugfix: path.isAbsolute() should always return boolean.

In windows version, path.isAbsolute is return '' on failed case.
this patch is fix this issue, so that it will return false on failed case.

on windows version:

* before: `path.isAbsolute('directory/directory'); // return ''`
* now: `path.isAbsolute('directory/directory'); // return false`