D29814: Fix segfault on no restart args

[David Faure]

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

REPOSITORY
  R285 KCrash

BRANCH
  for-upstream

REVISION DETAIL
  https://phabricator.kde.org/D29814

To: jpalecek, #frameworks, dfaure
Cc: kde-frameworks-devel, LeGast00n, cblack, michaelh, ngraham, bruns
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