empty delimiter

I’m getting a warning in my

Network Setup

Warning: strpos() [function.strpos]: Empty delimiter in D:\Hosting\12011950\html\wp-admin\network.php on line 327

This is whats on line 327

$home_path = 0 === strpos( $abspath_fix, $document_root_fix ) ? $document_root_fix . $base : get_home_path();

and I don’t see the problem. Looks like the right coding according to this link.

https://core.trac.ww.wp.xz.cn/browser/tags/3.9.1/src/wp-admin/network.php#L327

Please shed some light on the issue

Cheers