Update src/annoylib.h
Update src/annoylib.h

Co-Authored-By: rbares <12e9293ec6b30c7fa8a0926af42807e929c1684f@bares.me>
spotify/annoy,spotify/annoy,eddelbuettel/annoy,eddelbuettel/annoy,eddelbuettel/annoy,spotify/annoy,eddelbuettel/annoy,spotify/annoy