[PATCH 3/5] env: make env_set_default_vars() return void

[Wolfgang Denk <wd@denx.de>]

Dear Rasmus,

In message <20201110202603.20944-4-rasmus.villemoes@prevas.dk> you wrote:
> Unlike most other functions declared in env.h, the return value of
> this one also isn't documented. It only has a single caller, which
> ignores the return value. And the companion, env_set_default(),
> already has void as return type.
>
> Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk>

Naked-by: Wolfgang Denk <wd@denx.de>

This is not a good idea.  himport_r() can run into problems, and
then it returns an error code. Ignoring errors is never correct.

Instead, the caller should be fixed to add proper error handling.

env_set_default() at least prints a proper error message.

Best regards,

Wolfgang Denk

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