decode: remove useless packed attributes

src/decode-ipv4.h

@@ -84,7 +84,7 @@ typedef struct IPV4Hdr_
         } ip4_un1;
         uint16_t ip_addrs[4];
     } ip4_hdrun1;
-} __attribute__((__packed__)) IPV4Hdr;
+} IPV4Hdr;
 
 
 #define s_ip_src                          ip4_hdrun1.ip4_un1.ip_src

src/decode-ipv6.h

@@ -47,7 +47,7 @@ typedef struct IPV6Hdr_
         } ip6_un2;
         uint16_t ip6_addrs[16];
     } ip6_hdrun2;
-} __attribute__((__packed__)) IPV6Hdr;
+} IPV6Hdr;
 
 #define s_ip6_src                       ip6_hdrun2.ip6_un2.ip6_src
 #define s_ip6_dst                       ip6_hdrun2.ip6_un2.ip6_dst