Fix header macro invocation.
Fix header macro invocation.

binweiwu/lenskit,chrysalag/lenskit,kluver/lenskit,aglne/lenskit,kluver/lenskit,tajinder-txstate/lenskit,vaibhav345/lenskit,tajinder-txstate/lenskit,blankazucenalg/lenskit,kluver/lenskit,chrysalag/lenskit,binweiwu/lenskit,vaibhav345/lenskit,tajinder-txstate/lenskit,amaliujia/lenskit,vaibhav345/lenskit,vijayvani/Lenskit,tajinder-txstate/lenskit,blankazucenalg/lenskit,linjunleo/lenskit,martinlaz/lenskit,aglne/lenskit,linjunleo/lenskit,martinlaz/lenskit,vijayvani/Lenskit,kluver/lenskit,amaliujia/lenskit,kluver/lenskit,vaibhav345/lenskit