D21965: Avoid crash without XWayland

[David Edmundson]

This revision was automatically updated to reflect the committed changes.
Closed by commit R108:515f3cbb4e71: Avoid crash without XWayland (authored by davidedmundson).

REPOSITORY
  R108 KWin

CHANGES SINCE LAST UPDATE
  https://phabricator.kde.org/D21965?vs=60365&id=60511

REVISION DETAIL
  https://phabricator.kde.org/D21965

AFFECTED FILES
  shadow.cpp

To: davidedmundson, #kwin, zzag
Cc: zzag, kwin, LeGast00n, sbergeron, jraleigh, fbampaloukas, GB_2, mkulinski, ragreen, jackyalcine, Pitel, iodelay, bwowk, ZrenBot, ngraham, alexeymin, himcesjf, lesliezhai, ali-mohamed, hardening, jensreuterberg, abetts, sebas, apol, mart
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