Silence compiler warning when --disable-orte-static-ports

This commit was SVN r29783.

orte/mca/oob/tcp/oob_tcp_component.c

@@ -195,7 +195,9 @@ static int tcp_component_close(void)
 
     return ORTE_SUCCESS;
 }
+#if ORTE_ENABLE_STATIC_PORTS
 static char *static_port_string;
+#endif
 static char *dyn_port_string;
 
 static int tcp_component_register(void)