fix DEFAULT_PUBLIC_IP unbound variable error (#1488)
This will fix this error while installing: setup/questions.sh: line 95: DEFAULT_PUBLIC_IP: unbound variable
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@ -92,7 +92,7 @@ if [ -z "${PUBLIC_IP:-}" ]; then
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# On the first run, if we got an answer from the Internet then don't
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# ask the user.
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if [[ -z "$DEFAULT_PUBLIC_IP" && ! -z "$GUESSED_IP" ]]; then
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if [[ -z "${DEFAULT_PUBLIC_IP:-}" && ! -z "$GUESSED_IP" ]]; then
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PUBLIC_IP=$GUESSED_IP
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# Otherwise on the first run at least provide a default.
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