util/set: stop leaking u32 key sets which pass a mem ctx

Fixes: 10a76824137 ("util: add _mesa_set_create_u32_keys where keys are not pointers")

Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/9810>
1 file changed