Division by zero

[hub2]

From line 124 to 130:
start = time.time() while True: try: current = time.time() - start bps = (nbytes*8)/current pps = npackets/current
when this chunk of code gets executed fast enough, current is 0 and python throws and exception about float division error.
example Solution: setting current to non-zero value eg. 1 when it is 0

[correcthorsebatterystaple-sudo]

I implemented your idea in my pull request.