D6340: Fix incorrect error detection for missing knsrc files

[Dan Leinir Turthra Jensen]

leinir created this revision.
leinir added a project: KNewStuff.
Restricted Application added a project: Frameworks.
Restricted Application added a subscriber: Frameworks.

REVISION SUMMARY
  This fixes the error detection for knsrc files, which previously would report missing files only if the directory (or file) was unreadable by the user, and incorrectly describe the error.

REPOSITORY
  R304 KNewStuff

REVISION DETAIL
  https://phabricator.kde.org/D6340

AFFECTED FILES
  src/core/engine.cpp

To: leinir, #knewstuff
Cc: #frameworks, ZrenBot
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