[PATCH 07/10] tailq: fix cast macro for null pointer

[Bruce Richardson]

On Thu, Jun 19, 2025 at 09:10:33AM +0200, David Marchand wrote:
> Doing arithmetics with the NULL pointer is undefined.
> 
> Caught by UBSan:
> 
> ../app/test/test_tailq.c:111:9: runtime error:
> 	member access within null pointer of type 'struct rte_tailq_head'
> 
> Fixes: f6b4f6c9c123 ("tailq: use a single cast macro")
> Cc: stable at dpdk.org
> 
> Signed-off-by: David Marchand <david.marchand at redhat.com>
Acked-by: Bruce Richardson <bruce.richardson at intel.com>