Fix bad variable reference when checking for item score in Count-Min index.
Fix bad variable reference when checking for item score in Count-Min index.

jean/sentry,JamesMura/sentry,mvaled/sentry,looker/sentry,beeftornado/sentry,mvaled/sentry,mvaled/sentry,looker/sentry,jean/sentry,JamesMura/sentry,JamesMura/sentry,jean/sentry,mvaled/sentry,jean/sentry,gencer/sentry,mvaled/sentry,ifduyue/sentry,gencer/sentry,JackDanger/sentry,JamesMura/sentry,looker/sentry,mvaled/sentry,jean/sentry,looker/sentry,ifduyue/sentry,gencer/sentry,JackDanger/sentry,ifduyue/sentry,looker/sentry,beeftornado/sentry,gencer/sentry,gencer/sentry,ifduyue/sentry,beeftornado/sentry,ifduyue/sentry,JackDanger/sentry,JamesMura/sentry