Make sure no attempts to create empty comment for PR Scan on split

[attiasas]

• All tests passed. If this feature is not already covered by the tests, I added new tests.
• This pull request is on the dev branch.
• I used gofmt for formatting the code before submitting the pull request.
• Update documentation about new features / new supported technologies

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Try to fix the following issue:

12:03:58 [Error] pull request #35 scan in the 'test' repository returned the following error:
couldn't add pull request comment: Status: 400 Bad Request, Body: {"errors":[{"context":"text","message":"Please enter a non-empty value less than 32768 characters","exceptionName":null}]}

[github-actions]

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🐸 JFrog Frogbot

[eranturgeman]

see my question and just to make sure the condition is valid