Re: [FYI PATCH] t/helper/test-lazy-name-hash: fix compilation

> I was compiling origin/master today with stricter compiler flags today
> and was greeted by
> 
> t/helper/test-lazy-init-name-hash.c: In function ‘cmd_main’:
> t/helper/test-lazy-init-name-hash.c:172:5: error: ‘nr_threads_used’ may be used uninitialized in this function [-Werror=maybe-uninitialized]
>       printf("avg [size %8d] [single %f] %c [multi %f %d]\n",
>       ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>           nr,
>           ~~~
>           (double)avg_single/1000000000,
>           ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>           (avg_single < avg_multi ? '<' : '>'),
>           ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>           (double)avg_multi/1000000000,
>           ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>           nr_threads_used);
>           ~~~~~~~~~~~~~~~~
> t/helper/test-lazy-init-name-hash.c:115:6: note: ‘nr_threads_used’ was declared here
>    int nr_threads_used;
>        ^~~~~~~~~~~~~~~
> 
> I do not see how we can arrive at that line without having `nr_threads_used`
> initialized, as we'd have `count > 1`  (which asserts that we ran the
> loop above at least once, such that it *should* be initialized).
> 
> I do not have time to dive into further analysis.
> 
> Signed-off-by: Stefan Beller <sbeller@google.com>
> ---
>   t/helper/test-lazy-init-name-hash.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/t/helper/test-lazy-init-name-hash.c b/t/helper/test-lazy-init-name-hash.c
> index 6368a89345..297fb01d61 100644
> --- a/t/helper/test-lazy-init-name-hash.c
> +++ b/t/helper/test-lazy-init-name-hash.c
> @@ -112,7 +112,7 @@ static void analyze_run(void)
>   {
>   	uint64_t t1s, t1m, t2s, t2m;
>   	int cache_nr_limit;
> -	int nr_threads_used;
> +	int nr_threads_used = 0;
>   	int i;
>   	int nr;