fix Trying to access array offset on value of type null

[remicollet]

PHP 7.4 compatibility

[remicollet]

I'm aware this project is abandoned.
This is for legacy app (GLPI 9.4) while newer version (9.5) will use scssphp/scssphp

[robocoder]

Note to self: see if this is applicable to https://github.com/scssphp/scssphp ...
Not applicable to scssphp/scssphp.

[LukeTowers]

Looks like it's semi applicable to scssphp/scssphp@66675c1 @robocoder, not sure if the other two changes are needed too

[mahagr]

FYI:

If someone really needs the old leafo/scssphp because of reasons, here is how you can do it:

PHP 7.4 fix:
https://github.com/gantry/gantry5/blob/develop/src/platforms/grav/classes/Leafo/ScssPhp/Compiler.php

You can then autoload the modified file from you composer:
https://github.com/gantry/gantry5/blob/develop/src/platforms/grav/composer.json#L23

[mediaclinic]

This PHP7.4 fix really helped to fix the problem with SCSS. Thanks @mahagr. Is this fix going to be part of the official package, @LukeTowers? Any change to merge this fix @leafo?

[mahagr]

The project has been abandoned because of the person who owns this repository hasn't been around for long time. So I see no hopes for fixing this issue. Just raise the minimum php requirement to 5.6 and use scssphp/scssphp instead.