Wireshark must receive >=1 packet to create pipe

[d-burnett]

After starting the beamlogic adaptor software which launches wireshark, wireshark must detect at least 1 packet for the pipe to be formed. If you start the adaptor software, close wireshark, and /then/ switch on your 802.15.4 packet source, Argus won't be able to find a pipe.

Per Keoma: We should wait for the first packet to arrive before starting the script or find a way to initiate the pipe.

[changtengfei]

Can't this code be able to capture the error? https://github.com/openwsn-berkeley/argus/blob/master/ArgusProbe_Beamlogic.py#L80