add cast in HASH_SFH To quiet -Wsign-conversion
add cast in HASH_SFH To quiet -Wsign-conversion

iliastsi/uthash,iliastsi/uthash,Convey-Compliance/uthash,cheyiliu/uthash,thiloschulz/uthash,yxw2014/uthash,yxw2014/uthash,cheyiliu/uthash,fw1121/uthash,cheyiliu/uthash,fw1121/uthash,Convey-Compliance/uthash,Convey-Compliance/uthash,Convey-Compliance/uthash,fperrad/uthash,yxw2014/uthash,thiloschulz/uthash,cheyiliu/uthash,iliastsi/uthash,yxw2014/uthash,fperrad/uthash,iliastsi/uthash,fw1121/uthash,fperrad/uthash,thiloschulz/uthash,fw1121/uthash,thiloschulz/uthash,fperrad/uthash