[Kde-pim] Review Request: avoid three possible null pointer derefences

[Jaime Torres Amate]

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http://git.reviewboard.kde.org/r/101658/
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Review request for KDEPIM.


Summary
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do the job with the pointers inside the safe area if (not null).


Diffs
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  blogilo/src/mainwindow.cpp 732dc6d 
  knode/foldertreewidget.cpp d866c19 
  knode/knjobdata.cpp ac5971b 

Diff: http://git.reviewboard.kde.org/r/101658/diff


Testing
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Thanks,

Jaime Torres

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