Removing doubled search results from the grepview plugin

[George Syron]

It seems that some project files are added multiple times to the project's
file item list, so that the grep command sometimes shows the same result
multiple times. I've added a simple QSet to the grepjob method, so that the
file list written to the tmp file becomes unique. I haven't found any
performance issues with that, tested on kdevplatform and kdevelop source
trees.

Btw, this seems like it is a deeper problem, because project->files() is not
a unique list, and I think that also causes the "Show uses" feature to show
some results more than once.

Patch for grepview plugin is attached.

-- Syron
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.kde.org/pipermail/kdevelop-devel/attachments/20100709/2925a878/attachment.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: uniquegrep.patch
Type: text/x-patch
Size: 1261 bytes
Desc: not available
URL: <http://mail.kde.org/pipermail/kdevelop-devel/attachments/20100709/2925a878/attachment.patch>