Fixed double free.

git-svn-id: file:///home/svn/mapi/trunk@564 8d5bb341-7cf1-0310-8cf6-ba355fef3186

stdlib/libnids/tcp.c

@@ -82,10 +82,14 @@ free_tcp(struct tcp_stream * a_tcp, nids_instance_t *ni)
     a_tcp->prev_node->next_node = a_tcp->next_node;
   else
     ni->tcp_stream_table[hash_index] = a_tcp->next_node;
-  if (a_tcp->client.data)
+  if (a_tcp->client.data) {
     free(a_tcp->client.data);
-  if (a_tcp->server.data)
+    a_tcp->client.data = NULL;
+  }
+  if (a_tcp->server.data) {
     free(a_tcp->server.data);
+    a_tcp->server.data = NULL;
+  }
   if (a_tcp->next_time)
     a_tcp->next_time->prev_time = a_tcp->prev_time;
   if (a_tcp->prev_time)