[Nepomuk] Review Request: Fix crash when using nepomukcleaner with nepomuk disabled.

[Simeon Bird]

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Review request for Nepomuk.


Description
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Fix crash when using nepomukcleaner with nepomuk disabled. When nepomuk is disabled, now just exits.

Needs the related soprano review to actually work

==Unrelated==
Could I also backport 56e476cd9b995143b4ca9a67257dc7642c879841 to KDE/4.10? 

It fixes a crash, of the sort that we would probably get hundreds of bug reports about if it were released, in a pretty uncontroversial manner, 
so I committed it to master before noticing the release freeze had already started. 


This addresses bug 311753.
    http://bugs.kde.org/show_bug.cgi?id=311753


Diffs
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  cleaner/jobmodel.cpp e8e9acf 
  cleaner/mainwindow.cpp 9b7f0c7 

Diff: http://git.reviewboard.kde.org/r/107793/diff/


Testing
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Yup, no crash! 


Thanks,

Simeon Bird

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