Fix(installer): rare case where sql_version is not defined (#965)

[Rushaway]

Description

Ensure $sql_version is defined, if not give it a default value of 0.0.0 to let the rest of code run and throw error to user.

Motivation and Context

#965

How Has This Been Tested?

Tested with the guys who have an issue on sbpp discord, and it's now sovled.

Screenshots (if appropriate):

Types of changes

• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• [x] My code follows the code style of this project.
• [ ] My change requires a change to the documentation.
• [x] I have updated the documentation accordingly.
• [x] I have read the CONTRIBUTING document.

[Rushaway]

instead of 0.0.0 maybe we can throw a message ? cc @Hackmastr

[Hackmastr]

Hello,

Ideally, we should offer users the option to provide a version. Thanks.

[Rushaway]

Not sure, this not the normal behaviour to can not retrieve the version info. At this place something is already wrong. Allowing the user to provde a version does not mean the connection to the database was succesfull.