D8593: Only cleanup XRenderUtils is we actually created it

[David Edmundson]

davidedmundson created this revision.
davidedmundson added a reviewer: Plasma.
Restricted Application added a project: KWin.
Restricted Application added subscribers: KWin, kwin, plasma-devel.

REVISION SUMMARY
  BUG: 386430

TEST PLAN
  kwin_x11 --crashes 20
  Got a dialog. Hit cancel. It didn't crash

REPOSITORY
  R108 KWin

BRANCH
  master

REVISION DETAIL
  https://phabricator.kde.org/D8593

AFFECTED FILES
  plugins/platforms/x11/standalone/x11_platform.cpp

To: davidedmundson, #plasma
Cc: plasma-devel, kwin, #kwin, bwowk, ZrenBot, progwolff, lesliezhai, ali-mohamed, hardening, jensreuterberg, abetts, sebas, apol, mart
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