Code review comment for lp:~dobey/cmake-extras/intltool-fixes

If the message catalogue contains out of date translations, msgmerge will comment them out IIRC. Does anything similar happen with the gettext_process_po_files() function? Or are we just assuming that it doesn't matter because the files will naturally get updated as Launchpad merges translation updates? to trunk?

Other than that, I'm happy to see anything that reduces the work these cmake modules do.