D7888: Make sure OpenGL Context is valid before deleting shader

[Martin Flöser]

graesslin accepted this revision.
graesslin added a comment.
This revision is now accepted and ready to land.


  Feel free to push either of the two revisions.

REPOSITORY
  R108 KWin

BRANCH
  master

REVISION DETAIL
  https://phabricator.kde.org/D7888

To: davidedmundson, #plasma, graesslin
Cc: graesslin, plasma-devel, kwin, #kwin, ZrenBot, progwolff, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas, apol, mart
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