[PATCH] tzset_internal: do not reset old_tz if no change from default value

[Andreas Schwab]

On Feb 28 2025, Dominique Martinet wrote:

> tzset_internal returns early if tz is already set and did not change from old_tz,
> but in case of default value it always reprocesses the value.

That's because /etc/localtime is just a link.

-- 
Andreas Schwab, SUSE Labs, schwab@suse.de
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