empty css rule makes problems

[gitFrank]

Hi, can it be? A empty rule like .selector{} has as result that a some classes later following background image will not correctly converted to base64.

.selector {} ... some other filled classes .other-selector {background: url(folder/image.png) no-repeat; ... }

The part of this image in the generated css looks like: background: url(ꛠ ꛠ  · 0 · øꛠ °ꛠ < °ꛠ :1px solid gray;margin-bottom:4px}

if the empty .selector is commented all is fine. (PHP7.2, WinSCP, Notepad++)