cope with openbsd ancient nameser.h

Index: src/dissectors/ec_dns.c
--- src/dissectors/ec_dns.c.orig
+++ src/dissectors/ec_dns.c
@@ -172,13 +172,13 @@ FUNC_DECODER(dissector_dns)
             return NULL;
         
          /* alias */
-         if (type == ns_t_cname || type == ns_t_ptr) {
+         if (type == T_CNAME || type == T_PTR) {
             name_len = dn_expand((u_char *)dns, end, q, alias, sizeof(alias));
             q += a_len;
          } 
          
          /* name to ip */
-         if (type == ns_t_a) {
+         if (type == T_A) {
             int32 addr;
             struct ip_addr ip;
             char aip[MAX_ASCII_ADDR_LEN];
@@ -198,7 +198,7 @@ FUNC_DECODER(dissector_dns)
             //DISSECT_MSG("DNS: %s ->> %s ->> %s\n", name, alias, aip);
             DEBUG_MSG("DNS: %s ->> %s ->> %s\n", name, alias, aip);
          }
-         else if (type == ns_t_aaaa) {
+         else if (type == T_AAAA) {
             u_int16 addr[8];
             struct ip_addr ip;
             char aip[MAX_ASCII_ADDR_LEN];
