Code review comment for lp:~and471/inkscape/ocal-dialog-improvements

Now that the devlibs are updated, the Gtk::Spinner use is no longer a problem on Windows.

But as for now, it compiles correctly on Ubuntu 10.10, inkscape trunk revision 10371 (except that I had to download the OCAL.png manually). And I still have the crash reported in the very first comment, when selecting an image in the result list while the preview of another one is still loading.