fix deviding bignum by float [euslisp/EusLisp/issues/62]
fix deviding bignum by float [euslisp/EusLisp/issues/62]

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