lib/util: Use "is None" instead or "== None"
lib/util: Use "is None" instead or "== None"

RBE-Avionik/skylines,Turbo87/skylines,Turbo87/skylines,skylines-project/skylines,shadowoneau/skylines,RBE-Avionik/skylines,RBE-Avionik/skylines,RBE-Avionik/skylines,skylines-project/skylines,kerel-fs/skylines,snip/skylines,Turbo87/skylines,Harry-R/skylines,shadowoneau/skylines,TobiasLohner/SkyLines,TobiasLohner/SkyLines,shadowoneau/skylines,skylines-project/skylines,skylines-project/skylines,TobiasLohner/SkyLines,snip/skylines,shadowoneau/skylines,Turbo87/skylines,Harry-R/skylines,kerel-fs/skylines,kerel-fs/skylines,Harry-R/skylines,Harry-R/skylines,snip/skylines