Silence the valgrind report from the OOB

Refs trac:4033

This commit was SVN r30080.

The following Trac tickets were found above:
  Ticket 4033 --> https://svn.open-mpi.org/trac/ompi/ticket/4033

orte/mca/oob/base/oob_base_frame.c

@@ -70,6 +70,7 @@ static int orte_oob_base_close(void)
 
     /* destruct our internal lists */
     OBJ_DESTRUCT(&orte_oob_base.actives);
+    OBJ_DESTRUCT(&orte_oob_base.peers);
 
     return mca_base_framework_components_close(&orte_oob_base_framework, NULL);
 }