degesch: fix getpwuid usage
The "entry not found" case doesn't have to touch errno.
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@ -5523,6 +5523,7 @@ irc_autofill_user_info (struct server *s, struct error **e)
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return true;
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// Read POSIX user info and fill the configuration if needed
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errno = 0;
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struct passwd *pwd = getpwuid (geteuid ());
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if (!pwd)
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{
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