[15] RFR(XS): 8244182: Use root node as default for find_node when called from debugger

[Roland Westrelin]

> http://cr.openjdk.java.net/~chagedorn/8244182/webrev.00/

That looks good and trivial.

> I often find myself calling find_node(Node* n, int idx) from gdb using 
> the following command:
>
> (gdb) p find_node(C->_root, 42)
> $1 = (Node *) 0x7ffff08cab68

I wasn't aware of find_node(). You taught me a new trick...

Roland.