D28598: KRun: fix assert when failing to start an application

[David Faure]

dfaure created this revision.
dfaure added a reviewer: ahmadsamir.
Herald added a project: Frameworks.
Herald added a subscriber: kde-frameworks-devel.
dfaure requested review of this revision.

TEST PLAN
  'sudo chmod a-x /usr/bin/gwenview'
  Try opening a picure file from e.g. dolphin, you get an error message as expected, clicking OK makes dolphin crash because m_pids is empty and we hit an assert in QVector

REPOSITORY
  R241 KIO

BRANCH
  master

REVISION DETAIL
  https://phabricator.kde.org/D28598

AFFECTED FILES
  src/widgets/krun.cpp

To: dfaure, ahmadsamir
Cc: kde-frameworks-devel, LeGast00n, cblack, GB_2, michaelh, ngraham, bruns
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