Review Request: Fix crash when closing Amarok with running CoverFetcher

[Ralf Engels]

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Review request for Amarok.


Description
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childBarFinished was called with invalid m_progressDetailsWidget
However also the m_progressMap needs protection. The CompoundProgressBar needs to be thread safe.


This addresses bug 292553.
    https://bugs.kde.org/show_bug.cgi?id=292553


Diffs
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  src/statusbar/CompoundProgressBar.h baaab94 
  src/statusbar/CompoundProgressBar.cpp 371a534 

Diff: http://git.reviewboard.kde.org/r/105942/diff/


Testing
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Change is verified by me to fix the problem.


Thanks,

Ralf Engels

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