fix: prevent crash when the pad amount is negative

[Haegin]

Description

If the start is less than the (count - lineLength) + 1 pad will be negative and cause the call to repeat on line 477 to crash with an uncaught RangeError. This caused Vite to crash when I was converting an app from Create React App to use Vite.

What is the purpose of this pull request?

• Bug fix
• New Feature
• Documentation update
• Other

Before submitting the PR, please make sure you do the following

• Read the Contributing Guidelines.
• Read the Pull Request Guidelines and follow the Commit Convention.
• Check that there isn't already a PR that solves the problem the same way to avoid creating a duplicate.
• Provide a description in this PR that addresses what the PR is solving, or reference the issue that it solves (e.g. fixes #123).
• Ideally, include relevant tests that fail without this PR but pass with it.

This is my first time contributing to Vite (and nearly my first day using Vite), so please let me know if I've missed any steps or need to add anything.

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[patak-dev]

LGTM, it would be great to have a link to the project for reference if it is public. Or an explanation of the setup at least if not.