Not totally necessary, but good form - init the oversubscribed field in the orte_nid_t object

This commit was SVN r24127.

orte/runtime/orte_globals.c

@@ -936,6 +936,7 @@ static void orte_nid_construct(orte_nid_t *ptr)
 {
     ptr->name = NULL;
     ptr->daemon = ORTE_VPID_INVALID;
+    ptr->oversubscribed = false;
     OBJ_CONSTRUCT(&ptr->attrs, opal_list_t);
     OBJ_CONSTRUCT(&ptr->sysinfo, opal_list_t);
 #if ORTE_ENABLE_HEARTBEAT