two l33t entropy bugfixes: in vs of, log2(0) bug
two l33t entropy bugfixes: in vs of, log2(0) bug

signalnine/zxcvbn,dockbiz/zxcvbn,valeriansaliou/zxcvbn,paulballesty/zxcvbn,signalnine/zxcvbn,valeriansaliou/zxcvbn,alextekartik/zxcvbn,hn3000/zxcvbn,fo0nikens/zxcvbn,monsterwater/zxcvbn,dropbox/zxcvbn,valeriansaliou/zxcvbn,shotishu/zxcvbn,hnq90/zxcvbn,fo0nikens/zxcvbn,monsterwater/zxcvbn,TheeGrassHopper/zxcvbn,varenc/zxcvbn,hnq90/zxcvbn,dockbiz/zxcvbn,alextekartik/zxcvbn,TheeGrassHopper/zxcvbn,fo0nikens/zxcvbn,monsterwater/zxcvbn,monsterwater/zxcvbn,TheeGrassHopper/zxcvbn,varenc/zxcvbn,shotishu/zxcvbn,TheeGrassHopper/zxcvbn,dockbiz/zxcvbn,alextekartik/zxcvbn,shotishu/zxcvbn,hnq90/zxcvbn,varenc/zxcvbn,signalnine/zxcvbn,valeriansaliou/zxcvbn