fixed a couple comments

This commit was SVN r5194.

src/class/ompi_rb_tree.h

@@ -181,7 +181,7 @@ OMPI_DECLSPEC int ompi_rb_tree_destroy(ompi_rb_tree_t *tree);
   * @param action a pointer to the action function
   *
   * @retval OMPI_SUCCESS
-  * @retval OMPI_FAILURE if there is an error
+  * @retval OMPI_ERROR if there is an error
   */
 OMPI_DECLSPEC int ompi_rb_tree_traverse(ompi_rb_tree_t *tree,
                           ompi_rb_tree_condition_fn_t cond,

src/mca/base/mca_base_module_exchange.h

@@ -105,7 +105,7 @@ OMPI_DECLSPEC int mca_base_modex_send(mca_base_component_t *source_component,
    *
    * @retval OMPI_SUCCESS If a corresponding module buffer is found and
    * is successfully returned to the caller.
-   * @retval OMPI_FAILURE If no corresponding module buffer is found,
+   * @retval OMPI_ERR_OUT_OF_RESOURCE If no corresponding module buffer is found,
    * or if an error occurs wil returning the buffer to the caller.
    *
    * This is the corresponding "get" call to mca_base_modex_send().