add int to RowSelectExpr definition

[tylerriccio33]

This is super small but I'm pretty sure int should be a part of RowSelectExpr type definition. I found this in a pointblank pr where I'm trying to type all the signatures.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91.61%. Comparing base (de3580d) to head (b25e37c).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #800   +/-   ##
=======================================
  Coverage   91.61%   91.61%           
=======================================
  Files          47       47           
  Lines        5773     5773           
=======================================
  Hits         5289     5289           
  Misses        484      484           

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