D10549: Don't crash if the cursor theme fails to create

[Roman Gilg]

romangg accepted this revision.
This revision is now accepted and ready to land.

REPOSITORY
  R108 KWin

BRANCH
  dont-crash-cursor-theme-failure

REVISION DETAIL
  https://phabricator.kde.org/D10549

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