Fix db type error, when hostgroup is accidentially interpreted as integer

[cschra]

fixes #2821

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[bobapple]

The signed CLA is missing one or more GitHub usernames.

[cschra]

The signed CLA is missing one or more GitHub usernames.

sorry for the inconvinience, I submitted a new one

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[cla-bot]

Thank you for your pull request. Before we can look at it, you'll need to sign a Contributor License Agreement (CLA).

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[bobapple]

@cla-bot check

[Thomas-Gelf]

Please remove the superfluous indentation character on all three lines, to address Code Sniffer complaints. Then this is ready to be merged.

[cschra]

Please remove the superfluous indentation character on all three lines, to address Code Sniffer complaints. Then this is ready to be merged.

done

[Thomas-Gelf]

Merged, thank you!