[PATCH] regress: fix memleak in snprintftest

[Darren Tucker]

Applied thanks, except:

On Mon, 5 Aug 2019 at 16:38, Jitendra Sharma <jitendra.sharma at intel.com> wrote:
> +       if(src)
> +               free(src);

free(NULL) is defined as a no-op so the test is superfluous and I
omitted it from the commit.

-- 
Darren Tucker (dtucker at dtucker.net)
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