Silence warning

This commit was SVN r18057.

orte/mca/oob/tcp/oob_tcp.c

@@ -500,7 +500,7 @@ static void mca_oob_tcp_accept(int incoming_sd)
 static int
 mca_oob_tcp_create_listen(int *target_sd, uint16_t af_family)
 {
-    int flags, index, range, port;
+    int flags, index, range, port=0;
     struct sockaddr_storage inaddr;
     opal_socklen_t addrlen;