[U-Boot] lib: fix return codes when CONFIG_SYS_VSNPRINTF is enabled

[Tom Rini]

On Thu, Dec 19, 2013 at 03:14:19PM -0800, Darwin Rambo wrote:

> When CONFIG_SYS_VSNPRINTF is enabled, it protects print operations
> such as sprintf, snprintf, vsnprintf, etc., from buffer overflows.
> But vsnprintf_internal includes the terminating NULL character in
> the calculation of number of characters written. This affects sprintf
> and snprintf return values. Fix this issue by setting pointer 'str'
> back to the location of the '\0'.
> 
> Signed-off-by: Darwin Rambo <drambo at broadcom.com>
> Reviewed-by: Steve Rae <srae at broadcom.com>

Applied to u-boot/master, thanks!

-- 
Tom
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