Make sure pogcal_acquired only attempts to operate on 'ep' type series.

git-svn-id: http://svn.flexget.com/trunk@3267 3942dd89-8c5d-46d7-aeed-044bccf3e60c
Fix silly logic from last commit.

git-svn-id: http://svn.flexget.com/trunk@3268 3942dd89-8c5d-46d7-aeed-044bccf3e60c