Summary:
As noted by Thomas L we're casting the scaleFactor to an int far too
early, which in the worst case means we end up with Aurorare themes not
rendering.
This moves the rounding to where it's used per border.
BUG: 380524
Test Plan:
Forced Xft.DPI to 95 with xrdb. Confirmed that it was broken
Applied this patch. Got decoration again
Reviewers: #plasma, mart
Reviewed By: #plasma, mart
Subscribers: mart, rikmills, plasma-devel, kwin, #kwin
Tags: #kwin
Differential Revision: https://phabricator.kde.org/D6099
5091feb8f6