Review Request: Fix crash in KoColorPopupAction::updateIcon() when changing colour from outside UI thread

[Dan Leinir Turthra Jensen]

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Review request for Calligra.


Summary
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If one were to call addController without ensuring this happened in the UI thread, or before painter was ready, the previous code would cause a segfault. This diff fixes the problem.


Diffs
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  libs/widgets/KoColorPopupAction.cpp d97a04c 

Diff: http://git.reviewboard.kde.org/r/102082/diff


Testing
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Constructing tools outside the main thread, no crashes could be provoked in the new code.


Thanks,

Dan Leinir Turthra

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