I added the fix in the repository. Since it is not critical, I would not immediately build a new package.
http://anonscm.debian.org/gitweb/?p=debian-science/packages/wcslib.git;a=commit;h=f51d5034ca65c8b36c7224ce038e654bada7cf71 -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org