Work with PHP 7.x?

Hello,

I ran PHP Compatibility Checker plugin for PHP version 7.0 , and the file lib/ManualImageCrop.php generated the following warning:

1 | WARNING | File has mixed line endings; this may cause incorrect results

I tried the solution in this thread, but it did not fix:
https://www.ads-software.com/support/topic/mixed-line-endings-warning/

Any ideas?

Thanks,
Dean