fix distance error (caused by a buffer overrun)
fix distance error (caused by a buffer overrun)

tjrileywisc/annoy,spotify/annoy,spotify/annoy,pombredanne/annoy,pombredanne/annoy,eddelbuettel/annoy,tjrileywisc/annoy,tjrileywisc/annoy,spotify/annoy,eddelbuettel/annoy,eddelbuettel/annoy,spotify/annoy,eddelbuettel/annoy,pombredanne/annoy,tjrileywisc/annoy,pombredanne/annoy