fix 3rd argument of sort occured segfault
fix 3rd argument of sort occured segfault

bmagyar/EusLisp,aginika/EusLisp,aginika/EusLisp,bmagyar/EusLisp,bmagyar/EusLisp,aginika/EusLisp,aginika/EusLisp,wkentaro/EusLisp,wkentaro/EusLisp,bmagyar/EusLisp,wkentaro/EusLisp,wkentaro/EusLisp