Pan has been updated to version 0.13.2. Aside from bumping the version, version 0.13.2 requires gtk+ >= 2.0.5. I will attach the updated ebuild.
Created attachment 5830 [details] pan-0.13.2.ebuild
Thanks for your submission, but after a closer look there were some more things that needed fixing. Have a look to see what changed :) Next time provide a diff please. 0.13.2 in portage now.