* get_nns_by_vector_py: correct list copy
* get_nns_by_vector_py: correct list copy

pombredanne/annoy,guitarmind/annoy,Houzz/annoy2,subu-cliqz/annoy,pombredanne/annoy,eddelbuettel/annoy,BeifeiZhou/annoy,LongbinChen/annoy,LongbinChen/annoy2,eddelbuettel/annoy,LongbinChen/annoy,tjrileywisc/annoy,Houzz/annoy2,eddelbuettel/annoy,LongbinChen/annoy2,spotify/annoy,codeaudit/annoy,codeaudit/annoy,codeaudit/annoy,subu-cliqz/annoy,guitarmind/annoy,spotify/annoy,tjrileywisc/annoy,LongbinChen/annoy2,spotify/annoy,subu-cliqz/annoy,tjrileywisc/annoy,eddelbuettel/annoy,BeifeiZhou/annoy,tjrileywisc/annoy,BeifeiZhou/annoy,spotify/annoy,pombredanne/annoy,subu-cliqz/annoy,LongbinChen/annoy,guitarmind/annoy,Houzz/annoy2,pombredanne/annoy