JNI Avoid NPE for reading host binary data

[revans2]

Description

This avoids a potential null pointer exception when trying to read byte data from an empty column

Checklist

• I am familiar with the Contributing Guidelines.
• [] New or existing tests cover these changes.
• The documentation is up to date with these changes.

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (branch-22.12@b8ab576). Click here to learn what that means.
Patch has no changes to coverable lines.

Additional details and impacted files

@@               Coverage Diff               @@
##             branch-22.12   #11865   +/-   ##
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  Coverage                ?   87.52%           
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  Files                   ?      133           
  Lines                   ?    21807           
  Branches                ?        0           
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  Hits                    ?    19087           
  Misses                  ?     2720           
  Partials                ?        0           

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[revans2]

@gpucibot merge