Fix crash in XRenderPictureData::~XRenderPictureData
Summary: If the XRender scene has cross-faded a window, then, eventually, KWin/X11 will crash in the destructor of the XRenderPictureData class during tear down with the following message in the terminal ``` ASSERT: "qApp" in file /home/vlad/Workspace/KDE/src/kde/workspace/kwin/libkwineffects/kwinxrenderutils.cpp, line 163 ``` The crash happens because X11StandalonePlatform attempts to clean up XRender resources, including XRenderUtils::s_blendPicture, after the application object has been destroyed. In order to fix the crash, we have to destroy the platform object before the destructor of QCoreApplication is executed. Test Plan: - Enable maximize effect - Maximize a window - Replace the current instance of KWin/X11 with another one Without this patch, KWin/X11 crashes after the third step. Reviewers: #kwin, davidedmundson Reviewed By: #kwin, davidedmundson Subscribers: kwin Tags: #kwin Differential Revision: https://phabricator.kde.org/D25768
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2c8ff565
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