[U-Boot] [U-Boot, 1/2] pxe: Fix crash if 'sysboot' is run without args

[Tom Rini]

On Thu, May 07, 2015 at 09:29:18PM +0300, Tuomas Tynkkynen wrote:

> Previously, a NULL pointer dereference would occur if the 'sysboot'
> command is executed without any arguments.
> 
> Signed-off-by: Tuomas Tynkkynen <tuomas.tynkkynen at iki.fi>
> Reviewed-by: Simon Glass <sjg at chromium.org>

Applied to u-boot/master, thanks!

-- 
Tom
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