only declare var if we need it (SFSIP-122)

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@12017 d0543943-73ff-0310-b7d9-9358b9ac24b2

libs/sofia-sip/libsofia-sip-ua/su/su_localinfo.c

@@ -629,7 +629,6 @@ int localinfo4(su_localinfo_t const *hints, su_localinfo_t **rresult)
     struct ifreq ifreq[1];
     int scope, if_index, flags = 0, gni_flags = 0;
     char *if_name;
-    su_sockaddr_t su2[1];
 
 #if SA_LEN
     if (ifr->ifr_addr.sa_len > sizeof(ifr->ifr_addr))
@@ -747,6 +746,7 @@ int localinfo4(su_localinfo_t const *hints, su_localinfo_t **rresult)
 
 #if SU_HAVE_IN6
     if (su_xtra) {
+      su_sockaddr_t su2[1];
       /* Map IPv4 address to IPv6 address */
       memset(su2, 0, sizeof(*su2));
       su2->su_family = AF_INET6;