assigning a pointer to linked list to stuct element, changes list

[Tom Truscott]

>   if (NULL == (mpool_node = malloc (sizeof (mpool_node))))

That should instead be:

    if (NULL == (mpool_node = malloc (sizeof (*mpool_node))))
					      ^
This is such a common mistake that it would be nice if gcc
issued a warning.

Tom Truscott