[U-Boot] [PATCH] env: allow to export only selected variables

[Gerlando Falauto <gerlando.falauto@keymile.com>]

Dear Wolfgang Denk,

> --- a/common/cmd_nvedit.c
> +++ b/common/cmd_nvedit.c
> @@ -125,7 +125,7 @@ static int env_print(char *name)
>   	}
>
>   	/* print whole list */
> -	len = hexport_r(&env_htab, '\n',&res, 0);
> +	len = hexport_r(&env_htab, '\n',&res, 0, 0, NULL);
>
>   	if (len>  0) {
>   		puts(res);

Here you extended the function signature by adding 2 new arguments and 
therefore you had to touch 12 existing function calls so to add the 
default values for the new args.

In my previous patches, I had renamed the sibling himport_r() function 
to himport_ex() with the 2 extra args and reimplemented himport_r() as a 
wrapper, so to maintain compatibility with the existing code.
Just to realize now that, after some reworking, there is only one 
function call to the original himport_r() left.
I'm going to get rid of this renaming.

I mean: completely opposite approaches... funny, huh?

Best,
Gerlando Falauto