Review Request: Don't add qml elements twice to the scene, reduce warnings

[Aleix Pol Gonzalez]

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http://git.reviewboard.kde.org/r/108079/
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Review request for kdelibs, Plasma and Marco Martin.


Description
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don't addItem to the scene after calling setParentItem. It's redundant according to the api documentation and removes a warning.


Diffs
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  plasma/widgets/declarativewidget.cpp 81f09c3 

Diff: http://git.reviewboard.kde.org/r/108079/diff/


Testing
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Ran some plasmoids, works fine.


Thanks,

Aleix Pol Gonzalez

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