Fix for Issue #164.
Fix for Issue #164.

This should fix the Go runtime panic caused by Go-pointer-to-pointer
introduced in Go 1.6.

ross-williams/gopacket,google/gopacket,google/gopacket,ross-williams/gopacket,LrsK/gopacket,vtolstov/gopacket,LrsK/gopacket,LrsK/gopacket,rouzier/gopacket,skyportsystems/gopacket,vtolstov/gopacket,xuzhaokui/gopacket,levigross/gopacket,xuzhaokui/gopacket,rouzier/gopacket,adriantam/gopacket,ross-williams/gopacket,vtolstov/gopacket,adriantam/gopacket,google/gopacket,skyportsystems/gopacket,levigross/gopacket,adriantam/gopacket,xuzhaokui/gopacket,skyportsystems/gopacket,levigross/gopacket,rouzier/gopacket