D25953: Ignore parent scopes that are in the process of being removed

[Aleix Pol Gonzalez]

apol created this revision.
apol added a reviewer: Plasma.
Herald added a project: Frameworks.
Herald added a subscriber: kde-frameworks-devel.
apol requested review of this revision.

REVISION SUMMARY
  When we destroy a colorscope, all children will try to reparent. This patch
  makes it so they never pick an object if it's being removed.

TEST PLAN
  The logout screen greeter and kscreenlocker doesn't crash anymore
  upon close.

REPOSITORY
  R242 Plasma Framework (Library)

BRANCH
  master

REVISION DETAIL
  https://phabricator.kde.org/D25953

AFFECTED FILES
  src/declarativeimports/core/colorscope.cpp
  src/declarativeimports/core/colorscope.h

To: apol, #plasma
Cc: kde-frameworks-devel, LeGast00n, GB_2, michaelh, ngraham, bruns
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