Fixes an issue when no scaler is given, but it is present in the checkpoint

[cfd1]

Modulus Pull Request

Description

Fixes an issue when no scaler is given, but it is present in the checkpoint. Mentioned in issue #83

Checklist

• [x] I am familiar with the Contributing Guidelines.
• [x] New or existing tests cover these changes.
• [x] The documentation is up to date with these changes.
• [x] The CHANGELOG.md is up to date with these changes.

Dependencies

N/A

[cfd1]

I don't believe the documentation requires updating as it is a bugfix.

[mnabian]

/blossom-ci

[mnabian]

@cfd1 your change looks good to me. Thanks for contributing to Modulus!