Review last 3 changes to duchain

[Andreas Pakulat]

Hi,

I just checked in 3 changes for duchain to make kdev4 start up on win32 and
like to have the expert(s) review them. In particular the moving of the
KLockFile::unlock from after removeDirectory to before that in
itemrepository.cpp.

I think the last change is probably a no-brainer...

Andreas

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