Incorrect Image URL

My site is running on a URL - www.abc.com/xyz, i.e. my index.php file resides in xyz folder.
When I try to add the meta tags, og:image causes some URL issues.

It shows the URL as http://www.abc.com/xyz/xyz/sites/default/files/image.jpg.
"xyz" is repeated, as the actual URL should be http://www.abc.com/xyz/sites/default/files/image.jpg.
I checked on the code and found an issue with function "render_data" in file "opengraph_meta.common.inc"
For image, url() function has been used, and this is what might be causing the issue.
As for every link drupal already uses url() function, we ideally should not pass this from url function again, which is actually adding another layer of same data over again.

It is working fine where a site is hosted at domain like www.abc.com, and not when it is hosted on a subfolder like in my case.
Please check on this.