code/comment disagree in bits_util.py

[RossBoylan]

In the definition of fls:

    # gradually set all bits right of MSB
    # this technique is called 'bit smearing'
    # if ipv6, max bit index we want to smear is 2^7=64, 
    # otherwise it's 2^4=16
    max_power_of_2 = 7 if v6 else 5
    n = val | val >> 1
    for i in range(1, max_power_of_2+1):
        n |= n >> 2**i

The comment says the max index to smear is 2^4 for IPv4, but the next line says it's 2^5.
I don't know which is correct, though I'd guess it's the code.