Review Request 110138: missing checks for size(0, 0) and missing check before freeing pixmap

[Ömer Fadıl Usta]

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http://git.reviewboard.kde.org/r/110138/
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Review request for kdelibs, Aaron J. Seigo, Martin Gräßlin, and Marco Martin.


Description
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I was getting lots of errors while moving my mouse over system tray before this patch.( http://paste.kde.org/730880/ ) 
Also this patch fixes a forgetten check before freeing a already freed pixmap


Diffs
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  plasma/private/dialogshadows.cpp e787fd4 

Diff: http://git.reviewboard.kde.org/r/110138/diff/


Testing
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Looks like it is working fine


Thanks,

Ömer Fadıl Usta

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