traceroute: Use C89 function definition for one straggler.

contrib/traceroute/traceroute.c

 #include <netinet/libalias/alias_sctp.h>
 #else
 #include "alias_sctp.h"
 #endif
 
 /* Sizes of input and output link tables */
 #define LINK_TABLE_OUT_SIZE     4001
 #define LINK_TABLE_IN_SIZE      4001
+#define LINK_PARTIAL_SIZE       401
 
 #define GET_ALIAS_PORT          -1
 #define GET_ALIAS_ID            GET_ALIAS_PORT
 
 #ifdef _KERNEL
 #define INET_NTOA_BUF(buf) (buf)
 #else
 #define INET_NTOA_BUF(buf) (buf), sizeof(buf)
struct libalias {
         /* IP address incoming packets are sent to
          * if no aliasing link already exists */
         struct in_addr  targetAddress;
         /* Lookup table of pointers to chains of link records.
          * Each link record is doubly indexed into input and
          * output lookup tables. */
         LIST_HEAD     (, alias_link) linkTableOut[LINK_TABLE_OUT_SIZE];
         LIST_HEAD     (, alias_link) linkTableIn[LINK_TABLE_IN_SIZE];
+        LIST_HEAD     (, alias_link) linkPartialIn[LINK_PARTIAL_SIZE];
         /* HouseKeeping */
         TAILQ_HEAD    (, alias_link) checkExpire;
         /* Link statistics */
         unsigned int    icmpLinkCount;
         unsigned int    udpLinkCount;
         unsigned int    tcpLinkCount;
         unsigned int    pptpLinkCount;
         unsigned int    protoLinkCount;