dev-libs/STLport-5.2.1 was released on 2008-12-10.
kde team would like this one bumped too. For scribus. Nicely please :]
If somebody wants to take this up let me save you a little time: I tried renaming the ebuild and as none of the patches applied without error I also removed those, hoping they had been included upstream by the release of 5.2.1. But no luck, it fails with being unable to find Configure :( krename also indirectly depends on this package. My attempts where on an ~amd64 system.
Seems the current ~ versions of scribus and krename no longer need STLport, so unless another package needs them you can workaround by using the ~. Looking at the upstream there hasn't been a release for a long time so that might be the best solution.
Done.