Modify caption parsing logic in sub_rip.dart

[cuong292]

• Fix return no caption when sub rip have empty line at start of the file

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Code Review

This pull request addresses a bug in the SubRip caption parser where files starting with empty lines were not parsed correctly. The change replaces a break with a continue statement inside the parsing loop. This allows the parser to skip empty or invalid caption blocks and continue processing the remainder of the file, ensuring that all valid captions are extracted.

[stuartmorgan-g]

Thanks for the contribution! You haven’t checked off any of the items in the PR checklist above, so I’m assuming this is a work in progress and am marking it as a Draft. Please review the checklist, updating the PR as appropriate, and when that’s complete please feel free to mark the PR as ready for review.