D28430: Prefer holding a reference to an object we're going to call

[Aleix Pol Gonzalez]

apol created this revision.
apol added a reviewer: KWin.
Herald added a project: KWin.
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REVISION SUMMARY
  It's more correct and fixes a warning

REPOSITORY
  R108 KWin

BRANCH
  master

REVISION DETAIL
  https://phabricator.kde.org/D28430

AFFECTED FILES
  xdgshellclient.cpp

To: apol, #kwin
Cc: kwin, Orage, cacarry, LeGast00n, The-Feren-OS-Dev, cblack, jraleigh, zachus, fbampaloukas, GB_2, mkulinski, ragreen, jackyalcine, iodelay, crozbo, bwowk, ZrenBot, ngraham, alexeymin, himcesjf, lesliezhai, ali-mohamed, hardening, romangg, jensreuterberg, abetts, sebas, apol, ahiemstra, mart
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