Parskip in relative unit causes an error in lists

[Omikhleia]

This went in SILE 0.14.8:
sile-typesetter/sile@1ac793f

Since the (SILE) lists packages was based on (omikhleia's enumitem >) resilient.lists, perhaps it applies here too.

[Omikhleia]

See also #27 for a generalization (here, the issue at stakes was on cancelling the last (lists.)parskip and replace it with a (document.)parskip).

[Omikhleia]

perhaps it applies here too.

Oh yes it does, a relative parskip (e.g. font-relative, "1ex") will cause an error due to the fact it's not "absolutized" to points before performing a computation...

But as noted too, we could avoid the computation, and avoid an "early" absolutization...