fix npe-like-error
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@ -32,7 +32,7 @@ backupRootDirectory /etc/docker/daemon.json $BACKUP_DIR_ROOT/docker/
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### upload backup ###
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#####################
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if [[ "$1" == "--noupload" ]]; then
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if [[ $# > 0 && "$1" == "--noupload" ]]; then
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exit 0;
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fi
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