D6992: Fix build on Linux without X11

[Volker Krause]

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

REPOSITORY
  R285 KCrash

BRANCH
  master

REVISION DETAIL
  https://phabricator.kde.org/D6992

AFFECTED FILES
  src/kcrash.cpp

To: vkrause, #frameworks