D10405: Don't proceed in runCommandInternal if the executable doesn't exit

[Nathaniel Graham]

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

REPOSITORY
  R241 KIO

BRANCH
  master

REVISION DETAIL
  https://phabricator.kde.org/D10405

To: hein, dfaure, davidedmundson, mart, ngraham
Cc: #frameworks, michaelh, ngraham
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