[MassifVisualizer] Review Request 113122: Fix crash when toggling "Shorten templates" action without any proper massif document loaded.

[Arnold Dumas]

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Review request for Massif Visualizer.


Repository: massif-visualizer


Description
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When you open massif-visualizer and click on "Shorten Templates" action without any document loaded, it crashes. Same behavior happens when you (un)toggle the action from the configuration dialog when no document is opened. This patch fix this annoying behavior.


Diffs
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  app/mainwindow.cpp 5e1d5f4 

Diff: http://git.reviewboard.kde.org/r/113122/diff/


Testing
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The test passes.


Thanks,

Arnold Dumas

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