Small issue with temperature reading, for low temperatures ( < 0C )

[anfractuosity]

First of all thanks for your code, I've been using it for a bit now, I modified it slightly
so I could just generate a .csv file from my temp sensor.

I found a small bug recently, which as far as I can tell, occurs when temperature goes below 0C.

I managed to fix it I think, using something like below:

ret["temperature"] = returnnumberpacket(pkt[report_pkt_offset + 23:report_pkt_offset + 25])
if ret["temperature"] > 32767:
    ret["temperature"] -= (2**16)
ret["temperature"] = float(ret["temperature"]) / 10

As I noticed the temperature readings become something like:
6553.4 from the original code.

There could be a nicer way to fix this though.