Fix memory leak.
Fix memory leak.

xuzhaokui/gopacket,xuzhaokui/gopacket,levigross/gopacket,rouzier/gopacket,levigross/gopacket,google/gopacket,rouzier/gopacket,levigross/gopacket,rouzier/gopacket,google/gopacket,google/gopacket,xuzhaokui/gopacket