util: Add size to ralloc_header in debug mode

For 64-bit environments this just fills a padding.  Will enable
dumping more information when debugging ralloc trees.

Acked-by: Marek Olšák <marek.olsak@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/25482>
1 file changed