ppom af2f092b71 Fix crash when all the regexes of a filter have no pattern in them
Fix #66
Example configuration causing crash:
```yaml
streams:
  mongod_restart:
    cmd: [ 'sh', '-c', 'while true; do echo "Started MongoDB Database Server."; sleep 5; done' ]
    filters:
      mongo_restart:
        regex:
          - 'Started MongoDB Database Server.'
        actions:
          restart_chat_tel:
            cmd: [ 'systemctl', 'restart', 'nginx' ]
```
2024-01-09 12:00:00 +01:00
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