D7230: Save up a bunch of stat() calls on application start

[Aleix Pol Gonzalez]

apol created this revision.
Restricted Application added a project: Frameworks.

REVISION SUMMARY
  We are checking if every language known to us is present just to make
  sure that we have more than one and show the dialog entry.
  Always showing it is not a big deal and we'd save up this penalty at
  start.

REPOSITORY
  R263 KXmlGui

BRANCH
  master

REVISION DETAIL
  https://phabricator.kde.org/D7230

AFFECTED FILES
  src/khelpmenu.cpp

To: apol, #frameworks
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