[Buildroot] [PATCH] BR2_EXTERNAL: check it is a valid BR2_EXTERNAL dir before using it

[Yann E. MORIN <yann.morin.1998@free.fr>]

J?r?my, All,

On 2014-01-22 13:43 +0100, Jeremy Rosen spake thusly:
> my remark about the error message still not being clean still stands
> 
> and the doc is not explicit about Config.in and external.mk being 
> required

Hopefully, my new series will address those two points.

> if you don't want to add these to your patch I can post a separate
> one, but for the technical part :
> 
> Tested-by: J?r?my Rosen <jeremy.rosen@openwide.fr>

Thank you!

I haven't included your Tested-by in the new series, though, since I've
modified it more than a bit. Care to have a quick look?

Thanks for the feedback! :-)

Regards,
Yann E. MORIN.

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