[U-Boot] [PATCH] mkenvimage: fix usage message

[Mike Frysinger]

On Friday 02 March 2012 02:19:40 Wolfgang Denk wrote:
> Don;t use argv[0] for usage() because it may or may not be clobbered

Don't

> by the previous call to basename().  Use "prg" instead as it is done
> in the rest of the code.

Acked-by: Mike Frysinger <vapier at gentoo.org>
-mike
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