There should be one gap between the constructors and the destructors, otherwise

the last constructor will be set to NULL overwriting the first destructor. This
prevent us from calling the destructors on some classes.

This commit was SVN r9969.

opal/class/opal_object.c

@@ -112,7 +112,7 @@ void opal_class_initialize(opal_class_t *cls)
         perror("Out of memory");
         exit(-1);
     }
-    cls->cls_destruct_array = cls->cls_construct_array + cls->cls_depth;
+    cls->cls_destruct_array = cls->cls_construct_array + cls->cls_depth + 1;
     cls_construct_array = cls->cls_construct_array;
     cls_destruct_array  = cls->cls_destruct_array;