PHP Strict errors in hacks.php, already fixed in development version

Hi RavanH,

Thank you for your work on this plugin. I was writing to tell you about an error I’m seeing with strict error reporting from PHP. The error is:

Strict Standards: Only variables should be passed by reference in /wp-content/plugins/xml-sitemap-feed/hacks.php on line 213

The problem is caused by array_shift(array_filter($lastmodified)) in hacks.php in version 4.3.2.

But then I checked the development version of your plugin, which I found here:

https://ww.wp.xz.cn/plugins/xml-sitemap-feed/developers/

When I looked at the development version, I see that you have already fixed the problem in approximately the way I would have proposed.

So, keep up the good work. And if anybody else sees the error above, it seems a solution is in the works.