sres_blocking.c: fixed klocwork issues

darcs-hash:20080520161542-65a35-ff85265d8574adcfca61db0b47fa64b4870e2d61.gz

libsofia-sip-ua/sresolv/sres_blocking.c

@@ -111,7 +111,7 @@ int sres_blocking_update(sres_blocking_t *b,
 			 sres_socket_t new_socket,
 			 sres_socket_t old_socket)
 {
-  int i, N = b->n_sockets;
+  int i, N;
 
   if (b == NULL)
     return -1;
@@ -123,6 +123,8 @@ int sres_blocking_update(sres_blocking_t *b,
     return 0;
   }
 
+  N = b->n_sockets;
+
   if (old_socket != INVALID_SOCKET) {
     for (i = 0; i < N; i++) {
       if (b->fds[i].fd == old_socket)