[U-Boot] tools/proftool: fix use-after-free

[Tom Rini]

On Wed, Oct 07, 2015 at 03:48:48PM +0200, Vincent Stehlé wrote:

> The read_trace_config() can dereference the line pointer after freeing
> it on its error path. Avoid that.
> 
> This was found by Coverity Scan.
> 
> Signed-off-by: Vincent Stehlé <vincent.stehle at freescale.com>
> Cc: Simon Glass <sjg at chromium.org>

Applied to u-boot/master, thanks!

-- 
Tom
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