Fixed slight bias for old browsers
Fixed slight bias for old browsers

0 and 2147483648 had a 1 in 2^32 chance while 1 through 2147483647 had a 2 in 2^32. Now 0 through 2147483647 have the same probability... assuming isaac.rand() is a good source of random.
erans/dicepass,erans/dicepass,erans/dicepass