Fix warning when bytes are missing in Parquet BinaryBufferReader

[stloyd]

Change Log

Added

Fixed

• Fix warning when bytes are missing in Parquet `BinaryBufferReader`

Changed

Removed

Deprecated

Security

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Description

Detected by PHPUnit (with options: stopOnWarning="true" displayDetailsOnTestsThatTriggerWarnings="true" - ref #584) - https://github.com/flow-php/flow/actions/runs/6512389583/job/17689920950?pr=584#step:10:44

1) /Users/stloyd/Documents/flow/src/lib/parquet/src/Flow/Parquet/BinaryReader/BinaryBufferReader.php:61
Uninitialized string offset 13

Triggered by:

* Flow\Parquet\Tests\Integration\ListsReadingTest::test_reading_list_of_structures_column
  /Users/stloyd/Documents/flow/src/lib/parquet/tests/Flow/Parquet/Tests/Integration/ListsReadingTest.php:96

...

37) /Users/stloyd/Documents/flow/src/lib/parquet/src/Flow/Parquet/BinaryReader/BinaryBufferReader.php:61
Uninitialized string offset 49

Triggered by:

* Flow\Parquet\Tests\Integration\ListsReadingTest::test_reading_list_of_structures_column
  /Users/stloyd/Documents/flow/src/lib/parquet/tests/Flow/Parquet/Tests/Integration/ListsReadingTest.php:96