Review Request: some cppcheck fixes

[Jaime Torres Amate]

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http://git.reviewboard.kde.org/r/105190/
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Review request for Plasma.


Description
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1. avoid a memory leak
2. faster check for emptiness
3. arg(x,y) != arg(x).arg(y).... also, y can be 1.0 to be equal to the internal version somewhere bellow in the code.
4. check for data emptiness before it is used


Diffs
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  applets/kdeobservatory/src/commithistoryview.cpp 6152ed3 
  applets/kimpanel/backend/scim/main.cpp 2f2bacc 
  applets/mediaplayer/dbus/rootdbushandler.cpp 2dd2874 
  containments/groupingdesktop/lib/groupexplorer/groupicon.cpp 120ead3 

Diff: http://git.reviewboard.kde.org/r/105190/diff/


Testing
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I've using this patch too much time (too busy).


Thanks,

Jaime Torres Amate

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